摘要
以褐土土类为研究对象,探讨长期定点不施肥对土壤养分含量及作物产量的影响。结果表明,长期不施肥对土壤有机质、全氮、碱解氮、有效磷、速效钾都有明显的降低,且随年份的推后,降低幅度越大;长期不施肥可使小麦、玉米大幅度减产,但到达一定年份后无肥区产量趋于稳定。
The effects of no fertilization on soil nutrients and crop yield in brown soil in Tangyin County were studied.The result of long-term location test showed that without fertilization the content of soil nutrients declined obviously such as organic matter,total N,alkalytic N,available P and available K,and as time went on,it declined at more degree.The yield of wheat and corn was reduced greatly,production of no fertilization was steady when reaching certain year.
出处
《宁夏农林科技》
2012年第7期15-16,19,共3页
Journal of Ningxia Agriculture and Forestry Science and Technology
关键词
褐土
施肥
养分
产量
Brown soil
Fertilizer application
Nutrient
Production