【摘要】 应用AS型高效保水剂进行了不同施量造林试验 ,连续 8a测定试验林标准株生长情况结果表明 ,不同施量以穴施 2 .5g最优 ,保水持效期达 3个月以上 ,对半干旱地区提高造林成活率起到了关键作用。但对高、径生长影响不大 ;穴施保水剂对林木后期生长无负作用。更多还原

【Abstract】 Different quantities of AS-type efficient water-retaining agent was used in plantation and the growth of master trees in experimental wood was measured continuously for 8 years. The results show that the optimum quantity of water-retaining agent used in plantation is 2.5 g each hole. It can hold the soil water in the hole over three months. This will be very critical to improve survival rate in semi-arid region. But there are not obviously effects on height and diameter growth of trees. Experiment also proves that water-retaining agent in plantation is of no side effect on later growth of trees.更多还原