摘要
本文研究了自然免耕下土壤水分运动、分布、能态、贮蓄及有效性。结果表明:免耕垄作土壤水分以毛管水占主导,从垄沟到垄埂,从垄边到垄中,从垄底到垄顶形成一个水势梯度,土壤水吸力中高边低,上高下低,水分和水溶性养分不断地从垄沟流向垄埂土壤,满足作物生长发育所需。同时,自然免耕增加了土壤贮水功能,协调了大气降水与作物需水之间的矛盾,提高了降水利用率。
Soil water movement,distribution,potentiality and availabilitywere researched.The results showed that the ridge soil was controlledby capillary water;and there was a water potential gradient from thefurrow to the ridge,from the side-ridge to the middle-ridge and fromthe ridge bottom to the ridge surface.Water with solvable nutrientscontinually flowed from furrows to ridge soil and satisfied the growthand development of crops.Moreover,the water-storage capacity wasraised,the problem with the natural rainfall,the crop water consump-tion was harmonized and the utilized coefficient of the rainfall wasincreased under the condition of soil virginization.
出处
《西南农业大学学报（自然科学版）》
CSCD
1989年第1期7-12,共6页
Journal of Southwest Agricultural University
