渭北旱塬夏闲地开发利用研究

The EXploitation and Utilization of Summer Fallow Lands on Weiber Rainfed Highland

根据渭北旱塬农业生产和夏闲地现状，论证了渭北旱塬扩大复种开发夏闲地的必要性和可能性，并通过试验研究表明，虽然水分不足是扩大复种的主要限制因素，但只要因地制宜也可适度开发夏闲地（从三年四熟到一年二熟）。

The present situation of agricultural production and summer fallow landon Weibei Rainfed Highland can prove the necessity and possibility of expanding multi-ple cropping and exploitation of summer fallow land.Also,the field experiments indi-cated taht although water stress is a major constraint in expanding multiple cropping,itis possible to exploit summer fallow land (from 4 crops 3 years to 2 crops 1 year)in ac- cordance with the local conditions.