摘要
砂姜黑土10年定位试验结果表明:施肥是砂姜黑土小麦增产的关键,N肥增产贡献率为69.4%,P肥增产贡献率为23.3%,K肥为7.3%。P、K肥的肥效随时间的推移逐渐提高。凡施肥处理土壤有机质含量都有所提高,施P处理土壤速效P含量提高幅度较大,每年每公顷施135kg K2O尚不能满足一年两季作物的高产需求,应适当提高K肥用量。
The results of a 10-years located experiment showed that fertilization was the key measure to increase wheat yield. The contribution rates of N, P and K fertilizers to yield increase were 69.4, 23.3 and 7.3%, respectively. All treatments of fertilization could enhance the content of organic matter. Applying P fertilizer could improve the content of available P, but applying 135kgK2O per hectare per year did not yet meet the high production need of two croppings in a season. It is therefore necessary to enlarge K fertilizer rate suitably.
出处
《土壤通报》
CAS
CSCD
北大核心
2007年第1期55-57,共3页
Chinese Journal of Soil Science
基金
国家科技攻关项目(96-004-01-07)资助
关键词
砂姜黑土
长期施肥
小麦
土壤养分含量
Shajiang Black Soil
Long - term fertilization
Wheat
Soil nutrient content
