摘要
通过 2 0 0 2年长武县王东沟小流域土壤养分测定 ,结合 1982年长武县土壤普查中王东沟小流域养分普查数据及 1993年 CERN对王东沟小流域土壤养分普查数据进行分析 ,土壤有机质含量已经达到全国中等肥力水平 ,碱解氮、速效磷、速效钾的含量呈上升的趋势 ,但是氮磷养分比例不协调 ,成为限制农业生产的重要因素。该区域的土壤培肥途径是调整种植结构、增加养地作物的种植面积、增施有机肥。
According to 2002 soil nutrient determined data of Chang wu,Wangdonggou valley, and data of 1982 soil nutrient general survey, data of 1993 soil nutrient survey by CERN. Soil organic matter content has come to the middle fertility level of China.Alkali hydrolyzable N,available P,available K were rising in content, but N,P proportion were not harmonize, became the factor restricting agricultural production. Approaches of fertilization in this area is to balance the plantation, increase manure amount, scientific application of chemical fertilizer.
出处
《水土保持研究》
CSCD
2003年第1期81-84,共4页
Research of Soil and Water Conservation
基金
中国科学院知识创新工程项目 (KZCX2 -4 13)
国家科技攻关项目 (2 0 0 1BA5 0 8B18)
关键词
土壤养分含量
养分变化
培肥途径
soil nutrient content
nutrient variation
approaches of fertilization
