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改造天然次生林1.清林。山杏天然次生林中伴生的灌木及其它树种要全部清除,以增加光照强度和营养面积。2.修筑水土保持工程。山杏天然次生林,多生长于土层薄、水土流失严重的地方,修筑鱼鳞坑、水平沟等对提高产量有明显作用。3.刨树盘。最好在雨季或秋季进行,要掌握“里浅外深、夏浅秋深”的原则,树盘的直径要大于树冠,树盘下缘要筑土埂拦截雨水。刨树盘时要清除根蘖,以减少养分的消耗。4.更新复壮。在瘠薄山地上生长的山杏林,树势弱,枝梢枯,树干基部有萌发新枝的趋势,枝条颜色变暗。一般15—20年就衰老。
Transformation of the natural secondary forest 1. Qinglin. Wild apricot secondary forest secondary shrubs and other species to be completely removed to increase the light intensity and nutrient area. 2. To build soil and water conservation projects. Armenian natural secondary forest, more growth in the thin soil, where soil erosion is serious, the construction of fish scale pit, horizontal groove, etc. have a significant role in improving the yield. 3. Planing tree tray. The best in the rainy season or autumn, to grasp the “shallow depth, summer shallow autumn deep” principle, the diameter of the tree plate is greater than the crown, the lower edge of the tree plate to build soil 埂 intercepting rain. When planing tree roots to remove root tiller, in order to reduce nutrient consumption. 4. Renew and rejuvenate. Prunus armeniaca forest growing in the barren hills, the shrubs weak, shoots dry, the base of trunk tends to germinate new branches, branches darker. Generally 15-20 years old.