旱地马铃薯全膜双垄覆盖集雨沟播技术效益研究

在宁夏西吉县黄土丘陵缓坡地上对旱地马铃薯全膜双垄覆盖集雨沟播技术进行试验研究。结果表明：秋季和早春全膜双垄面覆盖、春季播种技术均具有明显的节水增效作用，以秋季全膜双垄沟播技术效果最为突出。该技术具有较强的纳水保墒、平抑地温的作用，能大大提高作物产量和水分利用效率；缩短作物全生育期，可有效防止早霜冻等自然灾害的侵袭；能改善土壤物理性状，培肥地力，有利于农田土壤肥力的可持续提高。

A Study of Benefit of Double Ridge Whole-mulching Rainwater Harvesting Furrow Sowing Technology for Dryland Potato

A study was conducted of the benefit of the double ridge whole-mulching rainwater harvesting furrow sowing tech- nology for dryland potato on the hilly loess slope land in Xiji county in Ningxia. The results showed that the double ridge whole-mulching in fall and early spring and the spring sowing technology had Obvious effects of water-saving and efficiency increasing; especially the effect of the double ridge whole-mulching furrow sowing technology in fall was most prominent. The technology had strong effects of water conservation and stabilizing soil temperature and the crop yield and water use ef- ficiency were upgraded greatly; the whole growth period of the crop was shortened and the natural disasters such as early frost could be avoided effectively; the soil physical properties was improved and the soil fertility was promoted and it was beneficial to the sustainable improvement of the soil fertility of the farmland.