论文部分内容阅读
１９８６～１９９０年对９～１０年生板栗低产园进行改造试验。试验后连续５ａ平均单位面积产量比开始前３ａ平均增加４１０．５％，１９９０年平均产量达到１３３９．２ｋｇ·ｈｍ－２，是开始前３ａ平均产量的９倍。低产园改造主要技术措施是：高接换种，缺株补植，深翻改土，施足基肥，因树修剪，以及套种、追肥和病虫害防治等。
From 1986 to 1990, 9-10 years old chestnut low yield garden was reformed. The average yield per unit area of 5a after the experiment increased by 410.5% from the beginning of 3a and the average output of 1990 reached 1339.2kg · hm-2, which was 9 times of the average yield of 3a before the beginning. The main technical measures for the transformation of low-yielding gardens are: high-replacement varieties, lack of plant replanting, deep turning over soil, applying sufficient base fertilizer, tree pruning, and interplanting, dressing and pest control.