摘要
干旱与土壤瘠薄是宁南山区旱作农业的两大重要限制因子，通过“旱”与“薄”对产量的效应研究表明：在小麦全生育期，正常年份降水量１８０ｍｍ～２００ｍｍ，其降水生产潜势为１６７４．０ｋｇ／ｈｍ２～１８６０．４ｋｇ／ｈｍ２，比实际产量高出一倍左右。土壤养份提供产量在５００ｋｇ／ｈｍ２～７５０ｋｇ／ｈｍ２。正常年份要实现小麦１０５０ｋｇ／ｈｍ２（丰收年）的产量，由于受降雨特点影响，存在３５．８ｍｍ耗水量的亏缺。采用小麦全生育期地膜覆盖栽培，集雨补灌可弥补亏缺。
Drought and poor soil are two limitation factors for dryland farming in mountain areas in the southern Ningxia. The experiment result of effect from drought and poor soil on yield showed that at normal years, the effective rainfall was 180 mm～200 mm during the wheat growing period,and the productive potential of rainfall was 1674.0 kg/hm 2 ～1860.4 kg/hm 2 , which was twice higher than the practical yield. The yield which nutrition in soil provided was between 500 kg/hm 2 ～750 kg/hm 2 . If the yield of wheat would expect to be 1050 kg/hm 2 , the water requirement should be increased by 35.8 mm in the normal years, which could be made up by the collected rain water with film mulching during the whole groweing period of wheat.
出处
《干旱地区农业研究》
CSCD
北大核心
1998年第1期94-99,共6页
Agricultural Research in the Arid Areas
关键词
冬小麦
降水量
土壤肥力
产量
winter wheat, yield, rainfall, soil fertility, the southern area in Ningxia
