台湾桂竹笋─幼竹生长规律研究

Growth of Bamboo Shoots and the Young Bamboo of Phyllostachys makinoi

台湾桂竹笋─幼竹生长规律研究黄克福，马炳杨（福建林学院林学系，福建南平３５３００１）（莆田县林业局，福建莆田３５１１００）摘要３０个样地材料分析结果表明：台湾桂竹出笋起始期为４月上旬或中旬，持续出笋２０～３０天；退笋率为２３％～３０％，成竹率较高；在...

The analysis of data from 30 quadrats shows that bamboo shoots of Phyllostachys makinoi start to break through the soil in the early or middle April,lasting about twenty to thirty days. The abortive rate of bamboo shoots is between 23 percent and 30 percent,which suggests higher survival rate of young bamboo stand. The highest production of bamboo shoots occurs on the present sites with stocking density of 3450 stems per hm￣2 to 3900 stems per hm￣2,and the initial bamboo shoots have the largest diameter at foot. A regression eguation was derived for the relationship between weight,diameter and height of bamboo shoots:W=-0. 428 49 +0. 021 99H+0. 028 12D,with a correlation coefficient of 0. 817 30. The duration is about 35 days from the emergence of bamboo shoots to the ending of young bamboo growth,and the increment is greater during night than in daytime.