摘要
通过黑土长期定位试验,查明了长期不同施肥条件下,土壤磷素积累及有效性。长期不施肥,土壤全磷下降37.4%,速效磷下降了60%;长期施用磷肥土壤全磷增加53.9%～65.7%,速效磷增加6～15倍。积累在土壤中的磷素具有生物有效性。
The soil phosphorus accumulation and its availability were tested through long term and fixed-site trails for black soil. The result show that total P and available P in soil decreased by (37.4%) and 60% respectively,if no fertilizer applying for a long time. If applying phosphorus fertilizer to black soil for a long term, total P and available P increased by 53.9%～65.7% and 6～10 times,respectively. The accumulated phosphorus in black soil is available to crop.
出处
《黑龙江农业科学》
2004年第4期5-8,共4页
Heilongjiang Agricultural Sciences
基金
黑龙江省自然基金资助项目(C9807)
关键词
长期施肥
黑土
土壤磷素
积累
有效性
black soil
phosphorus
availability
long-term fertilizer application
