9 research outputs found
PENGARUH RESIDU PUPUK P PADA MT I TERHADAP STATUS P TANAH dan HASIL PADI SAWAH PADA MT II di KABUPATEN DHARMASRAYA SUMATERA BARAT Tinggi Di Kabupaten Dharmasya Sumatera Barat
No full text<p align="center"><strong>ABSTRACT</strong><strong></strong></p><p><strong> E</strong><strong>ffectof</strong><strong> R</strong><strong>esidual</strong><strong> F</strong><strong>ertilizer</strong><strong> P </strong><strong>on</strong><strong> MTI </strong><strong>to</strong><strong> L</strong><strong>and</strong><strong> P S</strong><strong>tatusandResults Paddy Fieldon</strong><strong> MT II </strong><strong>in District Dharmasraya West Sumatera.</strong> Upland converted to paddy field, and intensively fertilized for 30 years causes the soil phosphorus (P) to be very high and the plant does not respond to the fertilization of P. P fertilizer residues given in the previous planting season needs to be studied its utilization for the next planting. This study aimed to examine the effect of P fertilizer residue on MT I with high P status to P status and paddy rice yield on MT II in Dharmasraya Regency. The research was conducted from August - December 2013 on newly established paddy field in Dharmasraya District with Typic Hapludults soil type. The results showed that the application of P fertilizer at MT I with high rate on the high P status was proven to be utilized by plant on MT II. However, to obtain high productivity of the plant is still needed additional P fertilizer. The residue of P fertilizer on MT I can still be utilized to increase yield on MT II by 8.46% from 4,444 kg dried milled grain/ha to 4,820 kg dried milled grain/ha. The increase of P fertilizer rate no longer has a significant effect on the increase of dried grain yield.</p><p> p<em>addy, f</em><em>ertilizer,phosphorus, residual effect.</em><em></em></p><p><em> <br /></em></p><p align="center"><strong>ABSTRAK</strong></p><p>Lahan kering yang dikonversi menjadi sawah, dan diberi pupuk secara intensif selama 30 tahun menyebabkan kadar hara fosfor (P) tanah menjadi sangat tinggi dan tanaman tidak respon terhadap pemupukan P. Residu pupuk P yang diberikan pada musim tanam sebelumnya perlu dikaji pemanfaatannya untuk tanaman berikutnya. Penelitian ini bertujuan untuk menguji pengaruh residu pupuk P pada MT I pada lahan sawah berstatus P tinggi terhadap status P tanah dan hasil padi sawah pada MT II di Kabupaten Dharmasraya. Penelitian dilaksanakan dari bulan Agustus - Desember 2013 pada sawah baru mapan di Kabupaten Dharmasraya dengan jenis tanah Typic Hapludults. Hasil pengkajian menunjukkan pemberian pupuk P pada MT I dengan dosis tinggi pada sawah dengan status P tinggi, terbukti masih bisa dimanfaatkan tanaman pada MT II. Namun demikian, untuk mendapatkan produktivitas tanaman yang tinggi masih diperlukan tambahan pupuk P. Residu pupuk P pada MT I masih dapat dimanfaatkan untuk meningkatkan hasil pada MT II sebesar 8,46% dari 4.444 kg GKG/ha menjadi 4.820 kg GKG/ha. Peningkatan takaran pupuk P selanjutnya tidak lagi berpengaruh nyata terhadap peningkatan hasil gabah kering giling.</p><p> <em>p</em><em>adi sawah, pemupukan, fosfor, pengaruh residu.</em><em></em></p></jats:p
The effect of straw compost on nutrient uptake and yield of rice in newly opened and intensive lowland
No full textThe objectives of this research were to determine the effect of natural materials added to the rice straw fermentation process; and to find the best formula for organic fertilizers to increase nutrient uptake, growth, and rice grain yield in newly opened and intensive lowland. The research was conducted at West Sumatra AIAT’s laboratory and lowlands at Dharmasraya Regency, West Sumatra Province, Indonesia from July to December 2017. The first research included three formulas of organic fertilizers and the second included six treatments produced from the first research. The results showed that increasing amount of titonia from 200 kg to 400 kg and rock phosphate from 5 kg to 20 kg per ton of rice straw increased compost’s nitrogen and phosphorus content of the compost from 1.22% to 1.36%, and from 0.75% to 1.68% respectively. Application of compost without inorganic fertilizers in newly opened lowland decreased 23% of yield and increased 4.7% yield when combined with inorganic fertilizers. The combined application of organic and inorganic fertilizers increased 10-12% yield and decreased 10% of yield without inorganic fertilizers in intensive lowland. Application of organic fertilizer without inorganic fertilizers not significantly influenced the growth. Combination of organic and inorganic fertilizers is the best way to increase lowland rice yield
PENGARUH RESIDU PUPUK P PADA MT I TERHADAP STATUS P TANAH dan HASIL PADI SAWAH PADA MT II di KABUPATEN DHARMASRAYA SUMATERA BARAT
Full text linkABSTRACT Effectof Residual Fertilizer P on MTI to Land P StatusandResults Paddy Fieldon MT II in District Dharmasraya West Sumatera. Upland converted to paddy field, and intensively fertilized for 30 years causes the soil phosphorus (P) to be very high and the plant does not respond to the fertilization of P. P fertilizer residues given in the previous planting season needs to be studied its utilization for the next planting. This study aimed to examine the effect of P fertilizer residue on MT I with high P status to P status and paddy rice yield on MT II in Dharmasraya Regency. The research was conducted from August - December 2013 on newly established paddy field in Dharmasraya District with Typic Hapludults soil type. The results showed that the application of P fertilizer at MT I with high rate on the high P status was proven to be utilized by plant on MT II. However, to obtain high productivity of the plant is still needed additional P fertilizer. The residue of P fertilizer on MT I can still be utilized to increase yield on MT II by 8.46% from 4,444 kg dried milled grain/ha to 4,820 kg dried milled grain/ha. The increase of P fertilizer rate no longer has a significant effect on the increase of dried grain yield. paddy, fertilizer,phosphorus, residual effect. ABSTRAKLahan kering yang dikonversi menjadi sawah, dan diberi pupuk secara intensif selama 30 tahun menyebabkan kadar hara fosfor (P) tanah menjadi sangat tinggi dan tanaman tidak respon terhadap pemupukan P. Residu pupuk P yang diberikan pada musim tanam sebelumnya perlu dikaji pemanfaatannya untuk tanaman berikutnya. Penelitian ini bertujuan untuk menguji pengaruh residu pupuk P pada MT I pada lahan sawah berstatus P tinggi terhadap status P tanah dan hasil padi sawah pada MT II di Kabupaten Dharmasraya. Penelitian dilaksanakan dari bulan Agustus - Desember 2013 pada sawah baru mapan di Kabupaten Dharmasraya dengan jenis tanah Typic Hapludults. Hasil pengkajian menunjukkan pemberian pupuk P pada MT I dengan dosis tinggi pada sawah dengan status P tinggi, terbukti masih bisa dimanfaatkan tanaman pada MT II. Namun demikian, untuk mendapatkan produktivitas tanaman yang tinggi masih diperlukan tambahan pupuk P. Residu pupuk P pada MT I masih dapat dimanfaatkan untuk meningkatkan hasil pada MT II sebesar 8,46% dari 4.444 kg GKG/ha menjadi 4.820 kg GKG/ha. Peningkatan takaran pupuk P selanjutnya tidak lagi berpengaruh nyata terhadap peningkatan hasil gabah kering giling. padi sawah, pemupukan, fosfor, pengaruh residu
Potential Selection of Arbuscular Mycorrhizal Fungi (AMF) Indigenous Ultisols through the Production of Glomalin
Full text linkThe arbuscular mycorrhizal fungi ( AMF ) with plants able to increase the capacity of plants to absorb nutrients and water from the soil. Recently, research was indicated that AMF hyphae containing glomalin as a glycoprotein that serves to unify the dispersed soil particles. The content of glomalin in soil is positively correlated with soil aggre- gate stability. The research potential of AMF species indigenous of Ultisol Darmasraya District of West Sumatra and glomalin production in experimental pots of sterile sand medium has been carried out. The purpose of this study was to determine the diversity of AMF species on Ultisol and to seeking indigenous AMF isolates that had the best glomalin production capability. AMF spores were isolated and identified from the rhizosphere soil of corn in Ultisol. AMF species that had been identified experimentally were tested in culture medium pot of sand and zeolite (w / w 1:1) using corn crops. The results found nine of the AMF species indigenous of Ultisol Darmasraya, namely Acaulospora scrobiculata, Glomus etunicatum, Glomus luteum, Glomus mosseae, Glomus verruculosum, Glomus versiforme, Scutellospora gregaria, Scutellospora heterogama and Gigaspora sp. AMF species that showed better colonization ability in corn was G. luteum, G. verruculosum and G. versiforme. All three species produced glomalin significantly higher than the other species, i.e. 1.29 mg g-1; 1.17 mg g-1; 1.15 mg g-1, respectively
Use of Organic Waste as an Alternative Organic Fertilizer and Synthetic Fertilizer to Ameliorate Acid Soil Productivity
No full textLiquid waste generated in large quantities in the palm oil mill has low pH, and high organic content and its use as an organic amendment could offer an environmentally friendly management strategy. This pot experiment aimed to evaluate the impact of organic waste of the liquid waste from the palm oil mill and synthetic fertilizer on organic carbon and nutrients of an acid soil and soybean yield. The treatments consisted of no synthetic fertilizers, half recommended dose of synthetic fertilizers (0.5R), synthetic fertilizers as recommended 50 kg ha-1 Urea + 200 kg ha-1 SP-36 + 150 kg ha-1 KCl (R) and organic waste with doses of 0, 5, 10, 15 and
20 t ha-1. The experiment was arranged in a completely randomized design with a factorial pattern and three replications. The results demonstrated that there was no significant interaction on soil chemical characteristics by the addition of organic waste and synthetic
fertilizers. However, organic waste addition increased soil pH, total organic C, labile organic C, humic acid C, total N, available P,
exchangeable K, and cation exchange capacity (CEC), whereas synthetic fertilizer addition only increased available P and exchangeable K. Exchangeable Al was significantly reduced by organic waste while significant effect didn’t occur with synthetic
fertilizers. The treatment of organic waste increased total organic C content by 7-24%. A larger sensitivity was indicated by labile organic C compared to total organic C and humid acid C so that labile organic C is a better indicator of alterations of soil organic C owing to organic waste treatment. The treatment of organic waste and synthetic fertilizers showed significant interactions on the dry weight of soybean seed, shoot, and root. The addition of synthetic fertilizers without organic waste increased the dry weight of the soybean seed, shoot and root by 133%, 133% and 140% respectively, while with the addition of 15 t ha-1 organic waste combined with synthetic fertilizer, enhancements by 262%, 261%, and 206% in the dry weight of seed, shoot and root were respectively found
Potential Selection of Arbuscular Mycorrhizal Fungi (AMF) Indigenous Ultisols through the Production of Glomalin
No full textThe arbuscular mycorrhizal fungi ( AMF ) with plants able to increase the capacity of plants to absorb nutrients and
water from the soil. Recently, research was indicated that AMF hyphae containing glomalin as a glycoprotein that
serves to unify the dispersed soil particles. The content of glomalin in soil is positively correlated with soil aggregate
stability. The research potential of AMF species indigenous of Ultisol Darmasraya District of West Sumatra
and glomalin production in experimental pots of sterile sand medium has been carried out. The purpose of this study
was to determine the diversity of AMF species on Ultisol and to seeking indigenous AMF isolates that had the best
glomalin production capability. AMF spores were isolated and identified from the rhizosphere soil of corn in Ultisol.
AMF species that had been identified experimentally were tested in culture medium pot of sand and zeolite (w / w
1:1) using corn crops. The results found nine of the AMF species indigenous of Ultisol Darmasraya, namely
Acaulospora scrobiculata, Glomus etunicatum, Glomus luteum, Glomus mosseae, Glomus verruculosum, Glomus
versiforme, Scutellospora gregaria, Scutellospora heterogama and Gigaspora sp. AMF species that showed
better colonization ability in corn was G. luteum, G. verruculosum and G. versiforme. All three species produced
glomalin significantly higher than the other species, i.e. 1.29 mg g-1; 1.17 mg g-1; 1.15 mg g-1, respectively.
Keywords: Glomalin, glycoprotein, indigenous, ultiso
Unraveling gene expression and physio-biochemical responses in citrus species under water stress and water recovery conditions
No full textIn Indonesia, many citrus trees are planted in marginal areas reliant solely on erratic rainfall, leading to suboptimal fruit production and quality. Meanwhile, studies on the response of gene expression and physio-biochemical traits in citrus seedlings derived from different species to water stress are limited. This study aims to fill that gap, exploring how drought and water recovery treatments affect citrus species. This study employed a factorial randomized block design with two factors: drought stress as the first factor and cultivar consisting of one-and-a-half-year-old Mandarin (Citrus reticulata Blanco. cv. Keprok Batu 55/K) and Tangerine (Citrus nobilis I. cv. Siam Banjar/S), as the second factor, each with three replications. The drought treatments were as follows: control, watering once a week (P1); drought stress for 13 days; water recovery for 39 days (P2); drought stress for 26 days; water recovery for 26 days (P3); P4: drought stress for 39 days; water recovery for 13 days (P4); and drought stress for 52 days (P5). Significant upregulation of drought-responsive genes such as ACS, ETR1, PIP1, PIP2, CsNF-YA5, and CHLASE was observed, particularly in the S cultivar following prolonged water deficit. The S also had a higher response than the K to the expression of genes related to flowering, such as Cs-LFY, Cs-AP1, and Cs-SL1. A significant interaction was detected on Chl-a (P5-K), Chl-b (P5-K), carotenoids (P5-K and P5-S), proline (P4-S), and TSS (P4-S). Based on gene expression, proline, TSS, flowering, and fruiting, this study suggests that the S cultivar is more tolerant than the K cultivar
Feasibility Analysis of Inpari IR Nutri Zinc Rice Seed Farming in Irrigated Paddy Fields in Riau Province
Full text linkRice variety Inpari IR Nutri Zinc is a type of rice that can be used to overcome stunting problems in Indonesian children, so it needs to be produced more. The production of this rice requires information on the financial feasibility of agricultural products so that it is attractive for cultivation on a more massive basis. This activity aims to determine the feasibility of farming the Inpari IR Nutri Zinc rice. A variety which is cultivated using (a) rice transplanter machine (Transplanter), (b) direct paddy planting with rice seeder (Atabela), (c) hand planting rice (Manual), as well as the level of profit from farmers’ income in the form of harvested dry grain (HDG), milled dry grain (MDG), and candidate rice seeds. The research was carried out in irrigated rice fields in Bunga Raya Village, Siak Regency, Riau Province by 3 cooperators each in a plot of 1 hectare. Observations were made on plant growth, yield production, production costs, revenues, profits, andrevenue cost ratio (RCR). Farming feasibility analysis is calculated using the RCR formula. The results showed that the plant height ranged from 92.7-99.9 cm and the number of productive tillers was 16-19 stems/clump. Changes in product form from HDG to MDG, and rice seed show increased production costs, revenues, profits, and RCR. The highest revenue (IDR 34,400,000 ha−1) and profit (IDR 17,750,000 ha−1), with a CRC of 2.07, was obtained from the transplanter planting method with the product form of rice seed.
Keywords: Inpari IR Nutri Zinc, revenue cost ratio, production feasibilit
Use of organic waste as an alternative organic fertilizer and synthetic fertilizer to ameliorate acid soil productivity
Full text linkLiquid waste generated in large quantities in the palm oil mill has low pH and high organic content and its use as an organic amendment could offer an environmentally friendly management strategy. This pot experiment aimed to evaluate the impact of organic waste of the liquid waste from the palm oil mill and synthetic fertilizer on organic carbon and nutrients of an acid soil and soybean yield. The treatments consisted of no synthetic fertilizers, half recommended dose of synthetic fertilizers (0.5R), synthetic fertilizers as recommended 50 kg ha-1 Urea + 200 kg ha-1 SP-36 + 150 kg ha-1 KCl (R) and organic waste with doses of 0, 5, 10, 15 and 20 t ha-1. The experiment was arranged in a completely randomized design with a factorial pattern and three replications. The results demonstrated that there was no significant interaction on soil chemical characteristics by the addition of organic waste and synthetic fertilizers. However, organic waste addition increased soil pH, total organic C, labile organic C, humic acid C, total N, available P, exchangeable K, and cation exchange capacity (CEC), whereas synthetic fertilizer addition only increased available P and exchangeable K. Exchangeable Al was significantly reduced by organic waste while significant effect didn’t occur with synthetic fertilizers.  The treatment of organic waste increased total organic C content by 7-24%. A larger sensitivity was indicated by labile organic C compared to total organic C and humic acid C so that labile organic C is a better indicator of alterations of soil organic C owing to organic waste treatment. The treatment of organic waste and synthetic fertilizers showed significant interactions on the dry weight of soybean seed, shoot, and root. The addition of synthetic fertilizers without organic waste increased the dry weight of the soybean seed, shoot and root by 133%, 133% and 140% respectively, while with the addition of 15 t ha-1 organic waste combined with synthetic fertilizer, enhancements by 262%, 261%, and 206% in the dry weight of seed, shoot and root were respectively found
