摘要
通过土壤测试得出:Olsen和ASI两种分析方法测得的土壤有效磷之间存在极密切直线正相关,其函数式为Y=0.211 1+0.406 x(R**=0.917 8),说明两种结果均可作为推荐磷肥的科学依据。田间试验得出:玉米施用磷肥最大效益和最高产量用量同供试土壤有效磷测定值之间存在极显著的直线负相关,其函数式分别为Y=100.16-1.250 6 x(R**=-0.800 2)和Y=117.47-1.296 6 x(R**=-0.764 2);依据土壤有效磷测得值同磷肥适宜用量的两个关系式,提出了玉米施用磷肥最大效益和最高产量的推荐量。
The results of determination of soil samples indicated that soil soluble phosphorus measured by Olsen method was positively correlated to that by ASI method. The equation was Y=0.211 1＋0.406X （R^＊＊=0.917 8）. This indicated that both could be used as basic data in recommend of phosphorus application. The results of field trial showed that both phosphorus application amounts for the maximum benefit and yield were negatively correlated with soil soluble phosphorus. The equations were Y=100.16-1.250 6X （R^＊＊=-0.800 2） and Y=117.47-1.296 6X （R^＊＊=-0.764 2）. According to these two equations and determined soil soluble phosphorus, the optimal phosphorus application for maximum benefit and maximum yield could be proposed.
出处
《吉林农业科学》
CSCD
2008年第2期25-28,共4页
Journal of Jilin Agricultural Sciences
关键词
OLSEN法
ASI法
土壤有效磷
玉米
磷肥最佳用量
Olsen method
ASI method
Soil soluble phosphorus
Maize
Optimal phosphorus application
