四川省长宁县硬头黄竹生长状况研究

A Study of the Growth of Bambusa rigida in Changning County of Sichuan Province

本文以长宁县竹海镇和龙头镇的硬头黄竹为研究对象,通过调查,分析其生长状况、生物量(地上部分)和土壤理化性质,结果表明:(1)两个地点的土壤容重、土壤总孔隙度和土壤饱和持水量0~40 cm两个地点均表现为差异不显著(P<0.05);0~20 cm土层中,除全N、全K、速效N表现为差异显著外(P>0.05),其余均差异不显著(P<0.05)。(2)竹海镇2 a生竹每公顷株数明显高于1 a生竹,前者是后者的1.77倍;龙头镇则差别不明显。(3)竹海镇1 a生年竹平均胸径小于龙头镇,而2 a生竹则大于龙头镇。(4)竹海镇、龙头镇1 a生竹的平均生物量分别为11.22±2.34 T·hm^(-2)、6.64±0.87 T·hm^(-2),2 a生竹的平均生物量分别为39.23±8.66 T·hm^(-2)、8.10±2.12 T·hm^(-2),均表现为差异显著(P>0.05)。(5)为提高硬头黄竹的产量,采取合理的经营措施(如施加P肥、K肥)是非常必要的。

In this paper,in vestigations were made on the biomass（ aboveground parts） of Bambusa rigida and physical and chemical properties of soil in Zhuhai town and Longtou town of Changning county The results showed that（ 1） the differences were not significant between 2 layers of soil（ 0 ~ 20 cm deep,20~ 40 cm deep） in soil bulk density,total porosity and saturated water holding capacity（ P 0. 05）. In the 0 ~ 20 cm soil layer,the total N,total K and available N showed a significant difference（ P 0. 05）,but the rest data indicated no significant difference（ P 0. 05）.（ 2） The number of 2-year-old bamboos was obviously larger than that of 1-year-old bamboos per hectare in Zhuhai town,the former was 1. 77 times that of the latter,while the difference was not significant in Longtou town.（ 3） The average DBH of1-year-old bamboos in Zhuhai town was smaller than that in Longtou town,while that of 2-year-old bamboos was higher than that in Longtou town.（ 4） The average biomass of 1-year-old bamboos in Zhuhai town and Longtou town was 11. 22 ± 2. 34 T/per hectare and 6. 64 ± 0. 87 T/per hectare respectively.The average biomass of 2-year-old bamboos was 39. 23 ± 8. 66 T/per hectare and 8. 10 ± 2. 12 T/per hectare respectively,all of which were significantly different（ P 0. 05）.（ 5） In order to increase the output,it was necessary to adopt reasonable management measures,such as applying P fertilizer and K fertilizer.