毛竹笋用林覆盖对竹鞭生长及竹笋产量的影响

对林地覆盖条件下土壤温度及竹鞭和竹笋生长的变化进行了研究。结果表明:毛竹笋用林覆盖使土壤温度得到明显提高,其土深20、40和60cm处的土壤温度分别比未覆盖林地相应提高12.5、12.8和11.3℃,而各土层间温度差异不显著;覆盖和未覆盖的平均鞭芽数量分别为5.00万个/667m²和3.86万个/667m²;鞭芽的萌发率随鞭龄的增加而提高,1~2年生、3~4年生、5~6年生鞭的鞭芽萌发率分别为10.4%、51.4%和64.6%;覆盖后对毛竹笋用林大小年现象影响明显,出笋小年竹笋产量可达1000 kg/667m²以上,大小年春笋产量比为1:0.61~1:0.97。

Effect of Mulching on Rhizome Growth and Bamboo Shoot Yield in Moso Shoot Productive Forest

The soil temperature and the change in rhizome and bamboo shoot growth under mulching were studied in moso shoot productive forest The results showed that the soil temperature increased significantly under mulching,and the soil temperature at the layers of 20,40 and 60 cm deep was 12.5,12.8 and 11.3℃ higher than the temperature of soil without mulching,while the temperature between these layers was not significantly different The number of mean rhizome buds were 50 000 buds/ha with mulching and 38 600 bud/ha without mulching,and the germinating rate of rhizome buds increased with the age of rhizome while the rhizome bud germinating rates of 1-2,3-4 and 5-6-year-old rhizome were 10.4%,51.4%and 64.6%,respectively.Mulching had obvious effect on the yield of moso shoot forest The shoot production could be more than 1 000 kg/ha at the years of low yield,and the spring shoots production between the years of high yield and of low yield was 1:0.61-1:0.97.