江西农业学报Issue(5)：42-45,4.
赣东北地区水稻土的有机质变化及其与产量和肥料利用率的相互关系
Ch ange in Soil Ogr anic Matter Content and Its Relations with Rice Grain Yield and Fertilizer Use Efficiency in Paddy Soil of Northeastern Jiangxi
摘要
Abstract
We studied the change in paddy soil organic matter content and its relations with rice grain yield and fertilizer use ef-ficiency in 11 experimental fields of northeastern Jiangxi.The results showed that the organic matter content in paddy soil in this area was generally low, and there were 62.7%fields whose soil organic matter content was less than 30 g/kg.In CK and OPT treatments, there was no significant correlation between soil organic matter content and rice grain yield.However, there was a significantly posi-tive correlation between soil organic matter content and rice grain yield in OPT-P treatment, but this correlation was not significant in OPT-K treatment.Thus, increasing the application rate of phosphate fertilizer is an important measure to increase the grain yield of rice in paddy soil with lower organic matter content.The soil organic matter content was significantly negatively correlated with the agronomic efficiency of phosphorus fertilizer, indicating that the application of phosphorus fertilizer plays an important role in rice yield improvement when the soil organic matter content was relatively low.But phosphorus fertilizer use efficiency declined gradually with the improvement of soil organic matter content.Therefore, in the northeast area of Jiangxi province, the application rate of phos-phorus fertilizer should be properly adjusted based on the soil organic matter content.关键词
水稻土/有机质/产量/肥料利用率Key words
Paddy soil/Organic matter/Rice grain yield/Fertilizer use efficiency引用本文复制引用
余瑞新,欧阳建平,王端飞,柳开楼,夏桂龙,李亚贞,胡惠文..赣东北地区水稻土的有机质变化及其与产量和肥料利用率的相互关系[J].江西农业学报,2015,(5):42-45,4.基金项目
江西省科技支撑计划资助（20141BBF60050）；公益性行业（农业）科研专项经费资助（201203030和201003016）；国家重点基础研究发展计划（973计划）子课题经费资助（2011CB100501－S06）。 （）
