笋竹两用毛竹林立竹密度与竹笋产量关系研究

The Relationship between the Density and Bamboo-shoots Yield of the Shoots and Bamboo Dual-purpose Moso Bamboo Forests

按不同的立竹密度梯度,在建瓯市毛竹笋竹两用林中设置固定标准地36块,连续6年观察和调查春笋、冬笋产量,建立春笋、冬笋产量与立竹密度的二次抛物线函数模型,结果表明:建瓯市毛竹笋竹两用林的立竹密度在140-180株·亩-1范围内,春笋、冬笋产量随着立竹密度的增大而递增。二次抛物线的拐点为180株/亩,新竹产量达到最大值。当立竹密度大于180株·亩-1时,新竹产量便随着立竹密度的增加而呈递减趋势。在建瓯市现行的毛竹林笋竹两用林林分结构、经营水平下,立竹密度以170-190株·亩-1为宜。

According to the density gradient,36 permanent sample plots were established in the shoots and bamboo dual-purpose Moso bamboo forests in Jianou,Fujian. The yield of bamboo shoots in spring and winter were successively measured for 6 years. Parabolic equations were fitted to describe the relationship between parent bamboo density and spring or winter bambooshoots yield. The results showed that in Jianou,the yield of spring or winter bamboo shoots increased with the increase of parent bamboo density within the rang of 140- 180 parent bamboo shoots per mu. The turning point of the quadratic parabola occurred when the density reached 180 parent bamboo shoots per mu. While,when parent bamboo density was more than180 plants per mu,the yield decreased with the increase of the bamboo density. Under the conditions of current stand structure and management level,in Jianou,it is advisable to make the parent bamboo density within the range of 170- 190 plants per mu.