土壤硝态氮速测箱(N-kit)在小麦追肥中的应用研究  

Topdressing Nitrogen Fertilizer Recommendation for Wheat Based on Quick Nitrate Nitrogen Test Box(N-kit)

作　　者：李志宏[1] 刘宏斌[1] 张福锁[2] 

机构地区：[1]中国农业科学院土壤肥料研究所农业部植物营养重点实验室,北京100081 [2]中国农业大学植物营养系,北京100094

出　　处：《土壤通报》2006年第1期99-102,共4页Chinese Journal of Soil Science

摘　　要：土壤硝态氮速测箱（N-kit）的测定结果和流动分析仪的测定结果有较好的相关性，相关系数为0．8101，说明孽方法能满足田间条件下的测试精度。该方法对北京地区小麦产量的预测精度分别为75％；小麦拔节期0～30cm土壤硝态氮速测的临界浓度范围分别为24．8～27．7mg kg^-1。并建立了不同测定值对应的追肥量指标。A good relationship （ r = 0. 8101 ） between the nitrate nitrogen concentration measured with quick nitrate nitrogen test box （ N - kit） and that of measured with CFA method suggested that the accuracy of N - kit can satisfy the need of on - farm testing. The prediction accuracy to crop grain yield of this method was 75% for wheat. The critical deficiency range of 0 - 30cm topsoil nitrate nitrogen concentration were 24.8 to 27.7mg kg^-1 for wheat just before jointing stage. Based upon the nitrate concentration in soil, the rate of topdressing nitrogen fertilizer could be recommended.

关 键 词：小麦 土壤硝态氮 土壤硝态氮速测箱 氮肥推荐 

分 类 号：S147.3[农业科学—肥料学]