摘要
研究采用施肥比例试验与施肥量试验统一在同一试验中与不同生态区条件下进行施肥量试验的方法,对土壤养分类型及施肥量与产量的函数关系进行了研究。研究提出了最大施肥量的概念,并对其构成因素、实质含义及变化规律等进行了深入分析。分析表明,最大施肥量是包含最佳施肥比例在内的土壤潜在玉米最高产量下的氮磷总用量,它是由土壤养分类型及养分的对比关系决定的,并不受年变化的影响,但年际变化显著影响最大施肥量的经济效果。
Combining application ratio with application amount experiment, we studied the functional relation among soil nutrition type, application amount and yield. We developed the concept of maximum fertilizer application amount and analyzed the comprising factors, and the actual meaning and changing rule of the can cept. The analysis showed that maximum fertilizer application amount consists of the total N and P amount applied at best ratio for highest maize yield. The amount was decided by soil nutrition type and proportional relation between nutrients. It was not affected by yearly change, but the yearly change could significantly influence the economic benefits of maximum application amount.
出处
《土壤通报》
CAS
CSCD
北大核心
2003年第5期427-431,共5页
Chinese Journal of Soil Science
基金
山西省"95"攻关项目"土壤作物系统调控施肥技术研究"部分内容
项目编号951009
