Effects of Agricultural Practices on Soil Organic Nitrogen Fractions in an Inceptisol of a Cocoa Plantation  

作　　者：Erwin Prastowo Endang Elfia Yuniasih John Bako Baon 

机构地区：[1]Soil and Water Sciences Laboratory, Indonesian Coffee and Cocoa Research Institute, Jember, East Java 68118, Indonesia [2]Education and Culture Services of Jember District, Jember, East Java 68118, Indonesia

出　　处：《Journal of Agricultural Science and Technology(A)》2013年第11期878-885,共8页农业科学与技术（A）

摘　　要：The effect of agricultural practices on soil organic nitrogen （N） fractions in a cocoa plantation has not been much revealed till now. Despite the fact that soil organic N has been long admitted for its importance to maintain soil fertility. Presented field experiment was conducted in Kaliwining Experimental Station, Indonesian Coffee and Cocoa Research Institute （ICCRI）, Jember, East Java, Indonesia, to investigate the effect of cocoa farm management, namely fertilization, weeding and soil tillage on the content of soil organic N fractions. The design of experiment was arranged in a split-split plot with two levels of weeding as main plots, two levels of soil tillage as subplot and three different fertilizer treatments as sub-sub plot. The analysis of soil N including total N and soil organic N fractions, namely, total hydrolized N, ammonium N, amino sugar N and amino acid N, were performed. The result showed that the effect of fertilization treatment was significant to the content of total N, ammonium N, amino sugar N and amino acid N. No-tillage treatment resulted in total N and amino sugar-N content increasing by 8% and 24%, respectively, over tillage treatment. Slashing treatment caused increase of the total N by 3% from herbicide treatment, whilst decrease of ammonium N and amino sugar N by 7% and 24%, respectively.

关 键 词：Soil organic N fractions cocoa （Theobroma cacao L.） FERTILIZATION WEEDING soil tillage. 

分 类 号：S158.3[农业科学—土壤学] S153.62[农业科学—农业基础科学]