摘要
宁夏黄土丘陵区耕地面积588.67万hm2,其中80%为坡耕地,年流失水分量为20mm~60mm,流失表土45t/hm2~180t/hm2,年降水量为250mm~600mm,蒸发量为其1.3~1.4倍,降水利用效率为2.25kg/(mm·hm2)。针对这一实际,结合科学研究成果和生产实践经验,初步总结出了黄土丘陵区旱作农田蓄水保墒耕作技术措施。其主要经验为深耕翻、新法种植、水平梯田、耙耱、镇压、中耕、地膜覆盖等7项技术措施,能最大限度地将天然降水就地入渗,并可提高降水利用效率。
The main measures adopted in the moisture retention cultivation technique in the loessial hilly rainfed farming areas are as follows: deep tillage, new methods of cultivation, horizontal terrace, soil hacking, soil compacting, intercultivation and mulching. The measures can make full use of rainfall and increase the utilized co efficient of rainfall, thus leading to a higher yield of agricultural products.
出处
《干旱地区农业研究》
CSCD
北大核心
1997年第1期33-38,共6页
Agricultural Research in the Arid Areas
基金
UNDP-CPR/91/114项目
关键词
黄土丘陵
旱作农田
蓄水保墒
loessial hill, rainfed farm, moisture retention,experience