文献类型：期刊文献

中文题名：林地覆盖经营对雷竹叶片非结构性碳水化合物与氮、磷关系的影响

英文题名：Influence of mulching management on the relationships between foliar non-structural carbohydrates and N,P concentrations in Phyllostachys violascens stand

作者：郭子武[1] 胡俊靖[1,2] 杨清平[1] 李迎春[1] 陈双林[1] 陈卫军[2]

第一作者：郭子武

机构：[1]中国林业科学研究院亚热带林业研究所;[2]中南林业科技大学

年份：2015

卷号：26

期号：4

起止页码：1064-1070

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；PubMed;

基金：浙江省省院合作项目(2013SY12);浙江省林业科技推广项目(2011B01);浙江省农业科技成果转化资金项目(2012T201-03)资助

语种：中文

中文关键词：雷竹;林地覆盖;非结构性碳水化合物;氮;磷

外文关键词：Phyllostachys violascens; mulching of bamboo stand; non-structural carbohydrates（NSC） ; N; P.

分类号：S795

摘要：为揭示雷竹生理生态对林地覆盖经营的响应与适应机制,测定了不同覆盖经营年限（CK、1、3和6年）雷竹林1~3年生立竹叶片可溶性糖、淀粉、氮（N）和磷（P）含量,分析了覆盖经营对雷竹林叶片非结构性碳水化合物（NSC）与N、P含量及其化学计量关系的影响.结果表明：覆盖经营1年雷竹林叶片NSC及可溶性糖含量较CK显著升高,N/P显著降低,N限制作用增强;覆盖经营3年雷竹林叶片可溶性糖含量较CK显著降低,淀粉含量显著升高,而NSC含量变化不明显,单位质量N、P的NSC含量最高;覆盖经营6年雷竹林叶片NSC、可溶性糖含量较CK显著降低,淀粉含量和N/P显著升高,P限制作用增强.短期覆盖（≤3年）经营雷竹林叶片NSC含量与N、P含量呈显著正相关,与N/P呈显著负相关;长期覆盖（6年）经营雷竹林叶片淀粉含量与N、P含量呈显著负相关,与N/P呈显著正相关.研究表明,短期覆盖（≤3年）经营雷竹林叶片N/P的降低可促使叶片淀粉分解和可溶性糖积累,明显增强雷竹生长活性,而长期覆盖（6年）经营雷竹林叶片N/P升高则促进叶片淀粉积累,雷竹生长由N限制转变为P限制,立竹生长活性明显降低,引起雷竹林退化.因此建议雷竹林连续覆盖经营不宜超过3年.
To understand the physiological adaptive mechanism of Phyllostachys violascens to inten- sive mulching management, the effect of mulching management （CK, 1, 3 and 6 years） on the concentrations and ratios of non-structural carbohydrates （ NSC ）, nitrogen （ N ） and phosphorus （P） in bamboo foliage, and their stoichiometry was investigated. The results showed the concentra- tions of NSC and soluble sugar increased, while the starch content and N/P decreased markedly in bamboo stand with 1-year mulching, compared to CK stand, which suggested the N limitation to bamboo growth was strengthened. Foliar soluble sugar content decreased significantly, while the starch content increased dramatically, and the NSC content by per unit mass of N and P reached the maximum in the bamboo stand with 3-year mulching, compared to all other treatments. Foliar NSC and soluble sugar contents decreased significantly, while foliar starch content and N/P increased dramatically in the stand with 6-year mulching, which suggested the P limitation to bamboo growth was strengthened. Foliar NSC content was positively correlated with N and P concentrations in a short- term mulching management stand （ ≤3 years）, while showed negative relationship with N/P. The fo- liar starch content in the stand with 6-year mulching was negatively correlated with N and P contents, while was positively correlated with N/P. The results indicated that short-term mulching management accelerated the accumulation of soluble sugar and decomposition of starch in foliage, thus the growth and activity of Ph. violascens was enhanced greatly. Long-term mulching management promoted the starch accumulation, which led to the transition from N limitation to P limitation for bamboo growth. In summary, long-term （6 years） mulching management caused the decrease of growth and activity of Ph. violascens dramatically, thus enhancing the bamboo stand degradation. The utilization efficiency of N and P reached the highest in the stand with 3-year mulching, which implied 3-year was the best suitable period for intensive mulching management for maintaining bamboo stand quality.