干旱地区林木生长所需要的水分几乎全靠天然降水,能否通过蓄水保墒措施,使有限的天然降水得到充分利用,是黄土高原植树造林成败的关键。近年来,我省黄土高原的蒲城、合阳、岐山、耀县、澄城等县,在川塬“四旁”绿化中改过去的挖坑植树为开沟植树,在蓄水保墒、促进林木生长方面收到了显 The water needed for forest growth in arid areas almost entirely depends on natural precipitation. Whether the natural precipitation can be fully utilized through water conservation and moisture conservation measures is the key to the success of afforestation on the Loess Plateau. In recent years, Pucheng, Heyang, Qishan, Yao County, Chengcheng and other counties in the Loess Plateau of our province have rehabilitated past pits and planted trees in the “four-sides” greening of the Sichuan Plateau. In planting and preserving soil moisture, Received significant growth