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(5(3-4):14-22)黃麻與鐘麻對於肥料三要素吸收性能之比較研究
No full textJute, Hoowae blue No.7 and kenaf, Madras red, were grown at the different rates of fertilization and a study. was made on the different behaviors. in the uptake of nutrient elements between them. Pot culture with the same treatments was also conducted so as to collect the shedded leaves during growth and the nitrogen content in leaves between jute and kenaf was compared.
The dry matter content both of jute and kenaf increased significantly with the increasing rate of fertilization up to a certain level, beyond which, however, an increased supply of fertilizers was unaccompanied by further striking increase in plant growth. The optimum nutrient level is likely to be less for kenaf than for jute.
Both in jute and kenaf, the percentage of nitrogen and potash increased almost consistently with the increasing rate of fertilizers application. However, the degree of increment was much more significant in the case of kenaf. Increase in fertilization had little effect ‘on the percentage of phosphoric acid in jute, but the reduction in the percentage of phosphorus with the increase in fertilization was found in kenaf. By comparing the average percentage of nitrogen, and potash between jute and kenaf, it was found that jute was high in nitrogen and low in potash. The difference in the percentage of phosphoric acid between them were insignificant. A similar result as stated above was obtained in the amount of nutrient element taken by these two crops.
Though most of the correlation coefficients between individual nutrient element were found positive, the significant correlation was found only between nitrogen and potash in both jute and kenaf. This finding may emphasize the importance of applying balanced nitrogenous and potash fertilizer for the growth of these two crops. Similar result was obtained in partial correlation, but an exception was found on the negative value of the partial correlation between nitrogen and phosphorus of kenaf. which indicates that the response of the phosphatic fertilizer on the production of kenaf fiber is very small.
The relationship between the dry matter content of shedded leaves and that of plant was studied in greenhouse condition and the amount of nutrient compositions of shedded leaves returned to soil by jute and kenaf were determined and discussed. No apparent difference in the nitrogen content of shedded leaves was found between jute and kenaf, but there was a striking difference in root distribution throughout the soil profile.
本試驗之目的在比較兩種麻類對于三要素吸收之性能及其落葉中所含氮成分之差異，藉江探討該兩項作物對于三要素之需要狀況及其對于上壤養分補選作用之關係。所用之黃麻品種為虎尾一青皮7號，鐘麻為Madras red.三要素施用量分為五平準，其中包括空白區。經田間與盆栽試驗結果。獲知兩種麻類對于氮鉀的需要均甚迫切，但因麻類的不同，在需要量上則有顯著差異，一般言之，鐘麻之含氮百分率與其需耍量均高于黃麻。而黃麻之含鉀百分率與其需要量則高于鐘麻。該兩種麻類對于磷肥的需要量均甚低，其中尤以鐘麻為然。兩種麻類落葉中含氮百分率差異不顯著。但落葉收量與麻株乾物量成正比，而鐘麻的植株收量一般均高于黃麻，因而鐘麻對于土壤養分的歸還可能較黃麻為多，同時鐘麻根群深達心土，對于表上養分的消費可能較黃麻為少
Soil fertility characteristics of Taoyuan paddy soils and their significance in soil numerical classification: I. Alluvial soils in Kaohsiung-Pingtung region and latosols and lateritic alluvial soils in Taoyuan prefecture.
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Experimental Study of Erosion and Runoff of Yellowish-Brown Grayelly Red Soil in Pinchin Tea District
No full text((9(1):21-39)AN EXPERJMENT ON THE TOP-DRESSING OF NITROCHALK TO RICE
No full text1. 若硝酸錏鈣比照硫酸錏同樣施用，即以1/2氮素作基肥，其餘1/2在第一期作插秧後20日施用，或在第二期作插秧後15日施用時，其肥效確較硫酸錏者為低，若以硫酸錏區之谷錏產量各作為100，則硝酸鈣鈣區之谷藁產量指數，在第一期作各為86.2及85.1，在第二期作各為92.3及90.5。若以每公斤氮素對于谷藁增產之公斤數比較之，硫酸錏中每公斤氮素在第一期作可較硝酸錏鈣中者多增產谷實7.3公斤，藁稈8.5公斤，在第二期作多增產谷實2.5公斤，藁稈4.2公斤。
2. 若在第一期作將半數之硝酸錏鈣均在插秧後20日施用，其餘則分別在插秧後40，50及60日施用，而在第二期作時半數之硝酸錏均在插秧後15日施用，另半數則分別在插秧後30~40及50日施用，而基肥完全不施用任何氮素肥料時，其對于谷實之收量確較以硝酸錏鈣作基肥施用者提高。但其對于每公斤氮素所增產之谷藁公斤數與硫酸錏者比較時仍見遜色。
3. 就谷實收量而言，以1/2氮素用硫酸錏作基肥，其餘用硝酸錏鈣作一次追肥時，若施用時期適當可與完全硫酸錏區相比擬，在本試驗情形之下，在第一期作以插秧後40以為宜，第二期作以插秧後30日為宜。若1/2氮素用硫酸錏作基肥，其餘用硝酸錏鈣平分兩次作追肥施用時，其效果不及前述以1/2氮素用硫酸錏作基肥其餘用硝酸錏鈣作追肥者。就藁稈收量而言，追肥施用遲者有減收之虞。
綜上而言，硝酸錏鈣作追肥確較基肥為優，但為稻谷增產完全起見，仍不分配于稱農為得策。
The purpose of this experiment was to study the merit of nitrochalk to he applied as a base dressing or as a top dressing and to find out the proper time of applying nitrochalk. Since application of nitrochalk alone would cause a reduction in yield of grain and straw as found by previous investigators, comparisons of treatments with various amount of ammonium sulphate applied as a base dressing in combination with a portion of nitrochalk as a top dressing were also made. This experiment was conducted at 8 locations under a representative variety of soils and climate conditions in 1955-1957. Its result may be summarized as follows:
In most cases, the response of rice to nitrochalk applied as a base dressing was decidedly inferior to that to ammonium sulphate through statistically significant test. Providing both yields of grain and straw derived from ammonium sulphate as 100, those from nitrochalk were 86.2 and 85.1 for the first crop, and 92.3 and 90.5 for the second crop, respectively.
Significant differences were usually found between top dressing and base dressing of nitrochalk. Yields increased by one kilogram of nitrogen derived from nitrochalk applied at various times were given in the following table. Data from ammonium sulphate were also presented for reference.
Taking the yield from the plot treated with ammonium sulphate as 100, those treated with one-half of nitrogen from ammonium sulphate and the other from nitrochalk were as follows:
It was found that yields of paddy rice produced by one third of nitrogen from ammonium sulphate and the other from nitrochalk were slightly lower than those given by one-half of nitrogen from ammonium sulphata and the other from nitrochalk.
It was concluded that nitrochalk should be allocated for the crops other than rice plant, otherwise, it should be applied properly as a top dressing in combination with ammonium sulphate as a base dressing
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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