粘质土旱作深松保墒试验研究

在旱作条件下，利用ＩＳＱ－ ２５０ 型全方位深松机对粘质土进行不同深度地全深松，结果表明：粘质土深松在不打乱土层的条件下，打破犁底层，形成一种虚实相间的土壤结构，从而改善了粘质土的物理性状，促进降雨入渗，增加土壤深层蓄水量；对改变土壤水的运移规律，协调土壤养分也起到一定的作用；深松后作物根系的形状明显发生变化，产量高达３０％ 以上；深松土壤的深度以３０ｃｍ 左右为宜

Experimental Study on Soil Moisture Conservation with Chiseling in Clay Soil Under Rainfed Farming

Under rainfed farming, Model ISO-250 chisel machine were used to chisel soil to different depths in clay soil. The moisture conservation effects on fields with different chiseling depths were investigated. Results show that chiseling can break the plough pan without disturbing original soil layers, and will create a good soil profile structure for crop growth. After chiseling, the physics characters in clay soil, such as rainfall infiltration in surface soil and water storing in subsoil, are improved obviously. Chiseling is also helpful to improve water movement, to harmonize nutrient supply and to accelerate root growth and extension in clay soil. Compared with no chiseling, yields increase more than 30%. The most suitable chiseling depth is 30cm in clay soil.