春、秋整地对吉林省西部农田风蚀、土壤含水量、土壤温度的影响研究

Effects of spring/autumn seedbed preparation on wind erosion,soil water and soil temperature of cropland in the western of Jilin Province

对比研究了春、秋整地对吉林省西部农田风蚀、土壤含水量、土壤温度的影响.结果表明:由于西部地区春季的大风天气和很少的降水量,春天整地导致土壤含水量减少、风蚀加剧;对比春整地,秋整地的苗床土壤可风蚀率和风蚀数量都较小,土壤含水量较高,土壤温度略低.因此,在该地区应以秋整地代替春整地;如果不能进行秋整地,春整地也要延迟到4月25日以后进行.

The aim of this study is compare to effects of spring and autumn seedbed preparation on wind erosion,soil water and soil temperature of cropland in the western of Jilin Province.Results showed that：spring seedbed preparation increases soil evaporation because of the occurrence of gale and low precipitation in this season,resulting in decreased soil water content and serious wind erosion.In comparison with spring seedbed preparation,the soil erodible fraction and the amount of soil erosion was less,soil water content was significantly higher and soil temperature was lowish for autumn seedbed preparation.Based on these results,spring seedbed preparation should be replaced by autumn seedbed preparation.The date of seedbed preparation should be postponed after 25th April in spring,if seedbed preparation could not be conducted in autumn.