摘要
根据土壤养分空间有效性理论，分析发现在表征土壤供氮能力方面，剖面硝态氮比耕层全氮、碱解氮等指标更有价值。在此基础上将剖面硝态氮导入综合肥料效应函数．使用０－６０ｃｍ中的硝态氮预测氮肥用量可达到相当的准确度．
According to the theory of soil nutrient bioavailaility,it was found that torepre-sent Soils,available nitrogen,nitrate in soil profile was more suitable comparing with total ni- trogen and alkali-hydrolyzable nitrogen in top soil(0-20cm).Based on this.nitrate in soilprofile was taken into integrated fertilization model first time,Very accurate nitrogen applica-tion amount was predicted by means of nitrate contents in 0-60cm depth soil.
出处
《仲恺农业技术学院学报》
1996年第1期26-31,共6页
Journal of Zhongkai Agrotechnical College
基金
国家八五科技攻关项目
关键词
冬小麦
硝态氮
综合肥料效应
函数
取样深度
nitrate in soil profile,integrated fertilizer response function, soil sample depth
