5 research outputs found
The Effect of Ammonium Nitrate Ratio and Support Types on the NPK Uptake and Growth of Black Pepper (Piper nigrum L.) in Field Conditions
Full text linkSvrha ovoga istraživanja bila je utvrditi učinak omjera NO3-:NH4+i vrsta potpornja na unos NPK i rast biljke papra u poljskim uvjetima. Istraživanje se koristilo potpuno slučajnim bloknim rasporedom s trima ponavljanjima. Prvi je čimbenik bio vrsta potpornja, koji se odnosio na mrtvo drvo i žive potpornje u obliku drveta Gliricidia sp. i Ceiba pentandra. Drugi je čimbenik bio omjer oblika N gnojiva, koji je iznosio 100% NO3-, 100% NH4+, 50% NO3-:50% NH4+, 75% NO3-:25% NH4+ te 25% NO3-:75% NH4+. Rezultati su pokazali da na unos N, P i K, kao i na rast biljke, nije utjecalo međudjelovanje omjera oblika N gnojivai tipa potpornja. U poljskim uvjetima crni papar preferira N gnojivou obliku 50% NO3-:50% NH4+. Biljke papra kojima je dodavano N gnojivo u kombinaciji 50% NO3-:50% NH4+ pokazale su unos N, P i K, a morfologija i suha masa biljke bili su viši negoli omjer drugih oblika N gnojiva.The study’s objective was to determine the effect of the NO3-: NH4+ratio and types of support on NPK uptake and pepper plant growth in field conditions. The study used a completely randomized block design with three replications. The first factor was the type of support, being the deadwood and living supports in the form of Gliricidia sp. and Ceiba pentandra. The second factor was the ratio of N fertilizer forms, which were 100% NO3-, 100% NH4+, 50% NO3-:50% NH4+, 75% NO3-:25% NH4+ and 25% NO3-:75% NH4+. The results have demonstrated that the uptake of N, P, and K, as well as the plant growth, were not affected by the interaction of the N fertilizer form ratio with the types of support. In field conditions, the black pepper prefers the N fertilizer in the form of 50% NO3-:50% NH4+. The pepper plants that were given N fertilizer in a combination of 50% NO3-:50% NH4+ have demonstrated an N, P, and K uptake, and morphology and plant dry weight were higher than the ratio of other forms of N fertilizers
INDUKSI KETAHANAN BIBIT KELAPA SAWIT (Elaeis guineensis Jacq.) TERHADAP CEKAMAN KEKERINGAN DENGAN APLIKASI BEBERAPA DOSIS BORIC ACID DAN SODIUM SILICATE
No full textThe research aims were 1) to determine the mechanical and physiological responses
of oil palm tissues to the applications of B and Si and 2) to determine the optimal
doses of B and Si that induce the oil palm seedling to drought resistance. The
research was arranged in Randomized Complete Block Design (RCBD) factorial
with three blocks as replication. The first factors were the doses of B, namely 0, 0.17,
0.44, 0.87, 1.31 and 1.75 g/crop. The second factors were the doses of Si, namely: 0,
1.15, 2.31, 3.46, and 4.61 g/crop. Observations were done on several variables of
microclimate, plant growth, physiological activity, anatomy and morphology of
crops as well as B and Si concentrations in crop tissues. Data were analyzed using
analysis of variance (ANOVA) at 5% levels, and continued using least significant
difference test (LSD). The optimum doses of B and Si that able to increase oil palm
resistance to drought stress were determined using regression analysis.
Morphological and physiological characters of oil palm seedlings that have direct
and indirect effects to the drought stress were determined through path analysis. The
results showed that the application of B was able to induce resistance of oil palm
seedlings to drought stress through physiological mechanisms, namely an increase in
the accumulation of proline, phenol and antioxidant activities as well as the
minimization of the free-radical activity in the form of H2O2. Meanwhile, Si
applications on oil palm seedlings were able to induce resilience to drought stress
through the structural reinforcement (thickening) of root cell walls indicated by the
increase of root firmness. The optimal doses of B that to induce the resistance of oil
palm seedlings to drought stress was 0.44 to 0.83 g/crop, meanwhile the optimal
doses of Si could not be found until 4.61 g applications/crop
Pengaruh Nisbah Pupuk ZA : KNO3 dan Macam Tiang Panjat terhadap Kadar NPK Jaringan Tanaman Lada Belum Menghasilkan
Full text linkAmonium dan nitrat merupakan bentuk hara nitrogen dalam larutan tanah yang banyak diserap oleh tanaman. Efisiensi serapan N antara kedua bentuk pupuk N tersebut dipengaruhi oleh macam tanaman dan faktor lingkungan. Penelitian bertujuan untuk mengetahui pengaruh rasio pupuk ZA : KNO3 terhadap kadar NPK dan efisiensi penggunaan N oleh tanaman lada yang belum menghasilkan. Penelitian dilaksanakan di desa Kemuja kecamatan Mendobarat kabupaten Bangka pada bulan Pebruari - September 2018. Penelitian menggunakan rancangan acak kelompok lengkap sebanyak tiga ulangan. Faktor pertama adalah jenis tiang panjat meliputi tiang panjat mati, gamal, dan kapuk, sedangkan faktor kedua adalah rasio pupuk ZA : KNO3 yaitu 100 % KNO3, 100 % ZA, CaNH4NO3 (50 % NO3- : 50 % NH4+) , 75 % KNO3: 25 % ZA, 25 % KNO3: 75 % ZA. Varietas yang digunakan adalah Nyelungkup. Hasil penelitian diperoleh bahwa kadar NPK jaringan tanaman, efisiensi penggunaan pupuk N dan efisiensi ekonomi tidak dipengaruhi oleh interaksi antara macam tiang panjat dan rasio pupuk ZA : KNO3. Macam tiang panjat tidak berpengaruh terhadap kadar NPK jaringan tanaman. Tanaman lada menggunakan tiang panjat mati lebih efisien dan ekonomis dalam penggunaan N dibandingkan tanaman menggunakan tiang panjat hidup. Macam rasio bentuk pupuk ZA : KNO3 tidak berpengaruh terhadap kadar N, P dan K jaringan tanaman. Efisiensi penggunaan N tidak beda nyata antar macam rasio pupuk N namun pemberian ZA pada rasio yang lebih besar dari KNO3 lebih ekonomis.
Pengaruh Nisbah Pupuk ZA : KNO3 dan Macam Tiang Panjat terhadap Kadar NPK Jaringan Tanaman Lada Belum Menghasilkan
Full text linkAmonium dan nitrat merupakan bentuk hara nitrogen dalam larutan tanah yang banyak diserap oleh tanaman. Efisiensi serapan N antara kedua bentuk pupuk N tersebut dipengaruhi oleh macam tanaman dan faktor lingkungan. Penelitian bertujuan untuk mengetahui pengaruh rasio pupuk ZA : KNO3 terhadap kadar NPK dan efisiensi penggunaan N oleh tanaman lada yang belum menghasilkan. Penelitian dilaksanakan di desa Kemuja kecamatan Mendobarat kabupaten Bangka pada bulan Pebruari - September 2018. Penelitian menggunakan rancangan acak kelompok lengkap sebanyak tiga ulangan. Faktor pertama adalah jenis tiang panjat meliputi tiang panjat mati, gamal, dan kapuk, sedangkan faktor kedua adalah rasio pupuk ZA : KNO3 yaitu 100 % KNO3, 100 % ZA, CaNH4NO3 (50 % NO3- : 50 % NH4+) , 75 % KNO3: 25 % ZA, 25 % KNO3: 75 % ZA. Varietas yang digunakan adalah Nyelungkup. Hasil penelitian diperoleh bahwa kadar NPK jaringan tanaman, efisiensi penggunaan pupuk N dan efisiensi ekonomi tidak dipengaruhi oleh interaksi antara macam tiang panjat dan rasio pupuk ZA : KNO3. Macam tiang panjat tidak berpengaruh terhadap kadar NPK jaringan tanaman. Tanaman lada menggunakan tiang panjat mati lebih efisien dan ekonomis dalam penggunaan N dibandingkan tanaman menggunakan tiang panjat hidup. Macam rasio bentuk pupuk ZA : KNO3 tidak berpengaruh terhadap kadar N, P dan K jaringan tanaman. Efisiensi penggunaan N tidak beda nyata antar macam rasio pupuk N namun pemberian ZA pada rasio yang lebih besar dari KNO3 lebih ekonomis.
The effect of light intensities on morpho-physiological and biochemical of black pepper (
Full text linkThe difference in the levels of light intensity was responded with changes in morphophysiological and biochemical characters of plants, especially in leaves of black pepper. The aim of this study was to determine the effect of several levels of light intensity on the morphophysiological and biochemical characters of leaves of black pepper. The research was conducted in July - November 2017 in Kemuja, Mendobarat, Bangka Belitung. This study used split-plot design with three replications. The main plots were the levels of light intensity, namely 100%, 75%, and 50%. Subplots were varieties of black pepper, namely Petaling 1, Petaling 2, and Nyelungkup. The results showed that there was no interaction between varieties and light intensities. The morphophysiological and biochemical responses of the leaves of the three varieties tested were the same at all levels of light intensity. Light intensity up to 50% has no effect on leaf morphological characters, but leaves become thinner at lower light intensities. Chlorophyll, nitrate reductase activity and leaf sucrose concentration were same at all light intensities up to 50%. Plants exposed to higher light intensity have a higher number of stomata. The results concluded that the light intensity of up to 50% did not cause changes in leaf morphology and biochemistry and only affected leaf stomata density
