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我场现有毛竹林4,281亩,平均每年采伐毛竹150万斤左右,正常大年每亩发笋200—300株,成竹率20一30%,成竹20万株左右,退笋数量10—15万斤左右.为了进一步摸清东坑地区花年毛竹林发笋、退笋、成竹的规律,1981、1983年我们进行了施肥和不同时间处理退笋的试验,以便进一步提高成竹率和成竹围度,促进林分增产.试验地及试验方法共设试验地16块,即:淡竹园(小地名)4块,每块0.25亩.位于山脚下部,西坡,坡度10°.其中1、2号在1981年3月22日每亩施碳铵(江宁化肥厂产)80斤,3、4号为对照.竹林结构见表1.西庵12块,每块0.3亩.位于山谷中上
My field of existing 4,281 acres of moso bamboo forest, cutting an average of about 1.5 million tons of bamboo harvest each year, the normal annual 200-300 bamboo shoots per acre, bamboo into 20 to 30%, about 200,000 bamboo shoots, the number of 10- 15 kilograms or so.In order to further find out the Dongkeng area flower bamboo hair bamboo shoots, retreat bamboo shoots, bamboo into law, 1981, 1983, we conducted a fertilization and different time treatment of bamboo shoots in order to further improve the bamboo rate The total area of test sites and test methods is 16, ie 4 for light bamboo garden (small place name), 0.25 mu for each block. Among them, No.1 and No.2 were given 80 kg of ammonium bicarbonate (Jiangning Chemical Fertilizer Plant) on March 22, 1981, and No. 3 and No. 4 were control. The structure of bamboo forest is shown in Table 1. 12 blocks of Xiyan, 0.3 mu each. In the valley