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在实现“一年栽竹、三年满园、五年成林、八年取材”的小块速生丰产林试验的基础上,为了进一步探索毛竹速生丰产的有效管理技术措施,我们进行了几项技术管理措施的试验。现将其中出笋前追施化肥对提高出笋率、成竹率的试验情况初步整理于下: 1.试验目的 根据毛竹退笋的主要原因之一系营养退所致,我们设想能否在出笋前,补充营养,即通过追施化肥的方法来提高毛竹的出笋率、成竹率。 2.试验地概况 试验地设在红岩工区,山湾坡地,坡向东南,土层深1米以上,黄粘土,PH值6.5。 3.造林情况 一九六七年春造,密度每亩二十株,当年保存率为百分之七十五,目前仍年年发笋成竹,属花年林分。 4.林分结构和历年成竹情况 详见表1、2。
On the basis of the experiment of small fast-growing and high-yield forest experiment of “planting bamboo in one year, garden in three years, forest planting in five years, drawing material in eight years”, in order to further explore the effective management and technical measures of quick-growing and high-yield bamboo, we conducted several Test of technical management measures. Now one of the bamboo shoots before topdressing fertilizer to improve the rate of bamboo shoots, bamboo into the trial of the initial order in the following: 1. The purpose of the experiment Bamboo back to one of the main reasons for the retreat of nutrition caused by retreat, we imagine whether Before the bamboo shoots, nutritional supplements, that is, by topdressing fertilizers to improve the bamboo shoots bamboo shoots rate, into bamboo. 2. Experimental Overview The experimental site is located in Hongyan work area, hill slope, slope to the southeast, soil depth 1 meter above, yellow clay, PH value 6.5. 3. Afforestation situation In the spring of 1967, there were 20 plants per acre with a preservation rate of 75% in the current year. At present, bamboo shoots are still growing year by year. 4. The stand structure and historical conditions are shown in Table 1 and 2.