旱地新建梨园采用微径流集水保水技术间作菜薯的试验报告

在采用微径流集水保水技术的旱地 2～ 3年生梨园 ,进行了间套甘薯、番茄、豆角、南瓜的试验。结果表明 :①相同的降水量下 ,微径流系统可使植树带内接纳的水量比对照区增加 2 .3～ 2 .6倍。并可使降雨量为 1.2mm的无效雨变为有效雨 ,在产流坡边缘至植树带内水渗宽度平均达18cm ,深度达 15cm ,0～ 15cm土壤含水量为 14.15%～ 17.0 7% ,为旱地果树及间作菜薯提供了良好的水分条件。②两年中甘薯平均产量为 12 571.5～ 1590 0 .15kg/hm2 ,经济收入 82 91.7～ 10 4 95.0 5元 /hm2 ;番茄平均产量为 2 0 50 8.4 5～ 2 3875.0 5kg/hm2 ,经济收入达 1910 0 .10～ 2 794 1.85元 /hm2 。③间作区梨树生育状况与盖膜未间套的对照区相比无显著性差异

A study on Application of Intercropping Vegetable and Sweet Potato to Arid New Pear Orchard by Micro Water Harvesting and Water Conservation Technology

The 1996～1997 period a study on intercropping sweet potato, tomato, pea and pumpkin in arid flat pear orchard of two or three years by micro water harvesting and water conservation technology was made. The result showed that water collected to the tree strip increased by 2.3 to 2.6 folds in the same time in contrast with that in the check. By that technique invailable 1.2mm precipitation has turned to be avilable and reached 18mm wide,15cm deep,and soil moisture at 0～15cm layer 14.15% to 17.07 %. It provided available water for intercropping vegetable and sweet potato in dryland orchard. In two years average output of sweet potato was 12 571.5 to 15 900.5kg/hm 2. And that of tomato was 20 508.45 to 23 875.05kg/ hm 2.The net increase value of sweet potato was 8 291.7 to 10 495.05 yuan and that of tomato was 19 100.10 to 27 941.85 yuan. Development of pear in intercropping area in not significant in contrast with that control without intercropping but covered with plastic film.