摘要
针对冀西北高寒半干旱区土壤瘠薄缺氮少磷特点，于１９９２年～１９９４年在旱滩地草甸栗钙土上进行了有机无机培肥试验研究。结果表明：有机无机肥配施后可使土壤总腐殖碳，胡敏酸及其消光系数、富啡酸值增加，土壤酶活性增强，养分状况显著改善，促进了＞０．０５ｍｍ微团聚体的形成，土壤团聚度和结构系数增高，土壤理化生物学性状改善。有机无机肥配施莜麦增产可达５３．２％～８０．６％，降水利用效率由未施肥的２．６８ｋｇ／（ｈｍ２·ｍｍ）提高到４．１０ｋｇ／（ｈｍ２·ｍｍ）～４．８３ｋｇ／（ｈｍ２·ｍｍ）。有机无机肥配施是充分提高作物产量和降水利用效率的有效措施。
In accordance with the character of poor nitrogen and phosphorus in soils in semiarid cold region with high elevation in northwest Hebei, the experiments of soil fertility improvement with organic and mineral fertilizers were conducted on meadow chestnut soil in drought shoaly land from 1992 to 1994. The results showed that complex application of organic and mineral fertilizers could increase the soil total humus, raise the content of HA and FA and the E4/E6 value of HA molecular, increase soil enzyme activity, obviously improve the nutrition status, promote the formation of miroaggregate which was larger than 0.05 mm, raise the degree of aggregation and the structural index of soil, and improve the soil physical, chemical and biological characters. The naked oats yield increased by 53.2 to 80.6 percent when complex applying organic and mineral fertilizers. The precipitation use efficiency increased from 2.69 kg/(hm 2·mm) of non fertilizer treatment to 4 .10 kg/(hm 2·mm)～4.83 kg/(hm 2·mm). The complex application of organic and mineral fertilizers was an effective method for full crop yield increase and precipitation use efficiency.
出处
《干旱地区农业研究》
CSCD
北大核心
1998年第3期20-24,共5页
Agricultural Research in the Arid Areas
关键词
旱地
土壤施肥
培肥
降水利用效率
高寒半干旱区
semiarid cold region, dryland, fertilizer application, fertility improvement, precipitation use efficiency
