摘要
应用氮磷等比和以磷定氮两种试验方案统一在同一试验中进行的设计方法,对施肥比例与最大施氮量的关系及氮磷养分的吸收利用进行了研究。结果表明,氮磷比例显著影响最高产量施氮量的试验结果,同时也显著影响氮磷养分的吸收和利用。氮磷等比条件下的最大施氮量范围内,玉米按比例吸收氮磷养分并有效转化,氮肥的利用率和生理利用率都比较高;而以磷定氮下土壤氮磷养分的不平衡供应则导致玉米对氮磷养分的不平衡吸收和转化,从而使玉米的产量水平降低。
By combining the project of equal rate of nitrogen and phosphorus with that of nitrogen rate varying with the P rates,the relationship between the optimum ratio of fertilizer application on corn and its maximum yield application rate and the utilization and uptake of soil nutrients for corn was studied.Results indicated that the ratio of applied N and P significantly affected not only the use efficiency and total uptake of corn but the maximum yield application rate.In so far as maximum yield N application rate under the condition of optimum application ratio of N and P,the nutrients of N and P were efficiently absorbed and utilized by corn and had higher recovery efficiency and physiological efficiency,and unbalanced absorption of N and P nutrient was formed due to the unbalanced supply of N and P nutrient and in the end led to the lower recovery efficiency and physiological efficiency.
出处
《土壤通报》
CAS
CSCD
北大核心
2010年第5期1120-1124,共5页
Chinese Journal of Soil Science
基金
山西省攻关项目(011015)资助
关键词
最大施氮量
最佳施肥比例
生理利用率
养分平衡
Maximum fertilizer rate
Optimum application ratio
Physiological efficiency
Nutrient balance
