外源性氮和磷对杉木和藜蒴锥混合凋落叶分解的影响

发布时间：2018-03-28 12:57

本文选题：杉木　切入点：藜蒴锥　出处：《西南林业大学学报(自然科学)》2017年04期

【摘要】：2007年12月在广东省佛山市高明区云勇林场的杉木和藜蒴锥林下以不施肥为对照,采用完全随机区组试验设计,进行施N肥、施P肥及施N+P肥等处理,分析华南地区杉木和藜蒴锥人工林的混合凋落叶分解对外源性N和P的响应。结果表明:施N对杉木和藜蒴锥林下混合凋落叶的分解有抑制作用,而施P的凋落叶分解速率最快,施N+P也促进了凋落叶分解。总体来看,藜蒴锥林下混合凋落叶的分解速率大于杉木林下的混合凋落叶。24个月后,杉木林下施N和N+P的混合凋落叶N含量显著大于其初始含量,而藜蒴锥林下各处理的混合凋落叶N含量均小于其初始含量;在杉木和藜蒴锥林下,施P和N+P的混合凋落叶P含量均显著大于其初始含量;混合凋落叶K含量在整个分解过程中波动较大。
[Abstract]:In December, 2007, under the forest of Chinese fir and Chenopodium fissa in Yunyong Forest Farm of Gaoming District, Foshan City, Guangdong Province, no fertilizer was applied, and the treatment of N fertilizer, P fertilizer and N P fertilizer was carried out by using a complete randomized block experiment design. The responses of mixed litter decomposition to exogenous N and P in Chinese fir and Chenopodium fissa plantation in South China were analyzed. The results showed that the application of N could inhibit the decomposition of mixed litter under Cunninghamia lanceolata and Chenopodium fissa plantation. In general, the decomposition rate of mixed leaves in Chenopodium fissa forest was higher than that under Chinese fir forest. After 24 months, the decomposition rate of mixed leaves in Chenopodium fissa forest was higher than that in Cunninghamia lanceolata forest. The N content of mixed litter leaves of Chinese fir and N P was significantly higher than its initial content, while the N content of mixed littered leaves of Chenopodium fissa forest was lower than that of Cunninghamia lanceolata and Chenopodium fissa, and the N content of mixed littered leaves was lower than that of Cunninghamia lanceolata. P content of mixed litter leaves with P and N P was significantly higher than its initial content, and K content of mixed litter leaves fluctuated greatly during the whole decomposition process.
【作者单位】：华南农业大学林学与风景园林学院;
【基金】：中央财政林业科技推广示范项目(2015-GDTK-07)资助
【分类号】：S714

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