华北农学报2011，Vol.26Issue(2)：170-174,5.
太行山山前平原秸秆还田条件下小麦磷、钾丰缺指标研究
The Study on the Abundance and Deficiency Indices of Phosphorus and Potassium of Wheat with Straw Returning in Taihang Mountain Piedmont Plain
摘要
Abstract
This paper was conducted to study the abundance and deficiency indices of phosphorus and potassium of winter wheat under the conditions of straw returning and soil fertility having changed significantly. Adopted grading methods to study the polynomial regression between the relative yield of wheat grain in lack fertilizer plots and whole fertilizer plots and the content of available nutrients in soil,the test analysed the abundance and deficiency indices of soil nutrients. The results indicated that the content of available phosphorus ＜ 2.4 mg/kg was extreme lack of available phosphorus;the content of 2.4 -10.3 rog/kg was severe lack;the content 10.3 -18.5 rog/kg was moderate lack;the content of 18.5 - 33.3 mg/kg was medium; the content ＞ 33.3 rog/kg was abundance, the content of available potassium ＜ 30.5 mg/kg was extreme lack of available potassium;the content of 30.5 -67.2 mg/kg was severe lack;the content 67.2 -92.0 mg/kg was moderate lack ;the content of 92.0 -126.5 mg/kg was medium ;the content was ＞ 126.5 mg/kg was abundance, compared to the abundance and deficiency indices established in 1980s -1990s ,the indices had significantly increase.关键词
太行山山前平原/冬小麦/磷、钾丰缺指标Key words
Taihang mountain piedmont plain/ Winter wheat/ Abundance and deficiency indices of phosphorus and potassium分类
农业科技引用本文复制引用
周晓芬,冯伟,杨军芳,孙丽敏,杜金钟,王素英,赵志兰..太行山山前平原秸秆还田条件下小麦磷、钾丰缺指标研究[J].华北农学报,2011,26(2):170-174,5.基金项目
国家科技支撑计划(2007BAD89B08) （2007BAD89B08）
