摘要
研究了外源性氮和磷对藜蒴(Castanopsis fissa)凋落叶的分解速率、分解过程中N、P、K含量的变化,有助于了解外源性N、P和N+P影响藜蒴凋落叶分解的机理,以便为科学合理经营藜蒴人工林提供科学依据。在广东云勇林场的藜蒴林地采用尼龙网袋分解法,设置了对照(CK)、施N(10 g·m-2)、施P(5 g·m-2)、施N+P(10 g·m-2+5 g·m-2)4种处理。结果表明:施N和N+P阻碍了凋落叶的分解,施P促进了凋落叶的分解。24个月后,对照、施N和P处理的凋落叶N含量显著大于凋落叶初始N含量;除施N处理外,其余处理的凋落叶P含量显著大于其初始P含量,其中施P和N+P使凋落叶的P含量大幅上升;凋落叶K含量在整个分解过程中波动较大。
The objective was to investigate the effects of external nitrogen and phosphorus on leaf litter decomposition rate, N, P, K concentrations in a Castanopsisfissa woodland, in order to understand the mechanism of influence of nitrogen and phosphorus on leaf litter decomposition and provide scientific basis for the rational management of the C. fissa plantations. Leaf litter decomposition was studied using the litterbag technique in a Castanopsisfissa plantation in Yunyong Forest Farm, Guangdong province, South China. N and P additions were designed with four treatments： control, N addition （10 g N＇m＇2）, P addition （5 g P＇m-2）, and N＋P addition （10 g N.m2＋5 g P.m2）. N and N＋P additions hindered litter decomposition of leaf litter of C. fissa, whereas P addition improved litter decomposition. 24 months after the decomposition, the N content of leaf litters with N and P additions and the control was significantly greater than their initial N content. In addition to, the P content of leaf litter except for N addition was significantly greater than their initial P content, in which increase range of P content of leaf litter with P and N＋P additions was great. The content of K of leaf litter fluctuated greatly during the whole decomposition process.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2017年第7期105-111,共7页
Journal of Central South University of Forestry & Technology
基金
中央财政林业科技推广示范项目"广东省生态公益林培育技术推广"(2015-GDTK-07)
关键词
藜蒴人工林
凋落叶
分解速率
外源性N和P
养分释放
Castanopsisfissa plantation
leaf litter
decomposition rate
N and P addition
nutrient content release
