杉木人工幼林固氮植被的林间生态经营研究  

Ecological Management of Nitrogen-fixing in Chinese Fir Young Plantation

作　　者：刘慧娟[1] 王宗永[1] 刘君昂[1] 周国英[1] 何苑皞[1] 谭益民[1] 

机构地区：[1]中南林业科技大学经济林培育与保护省部共建教育部重点实验室,长沙410004

出　　处：《湖北农业科学》2014年第24期5978-5983,共6页Hubei Agricultural Sciences

基　　金：国家公益性行业林业科研专项经费项目(201004014)

摘　　要：杉木[Cunninghamia lanceolata（Lamb．）Hook．]人工林随着连栽代数的增加，容易表现出土壤肥力退化和生产力下降。本研究采用菌株回接的方法，将3种结瘤苗木野葛（Yg）、六月雪（Lyx）、一年蓬（Ynp）移植到样地上，测定了3种不同处理模式下林地土壤有机质和N、P、K含量，同时并测定了试验地幼杉生长量的指标。结果表明，黄丰桥国有林场林龄为3年的幼林地不同固氮植被恢复模式各层土壤有机质及N、P、K含量有所增加。0-40cm土壤有机质含量由高到低依次为Yg处理林地〉Lyx处理林地〉对照林地〉YnP处理林地；0～20cm，Yg处理下林地土壤有机质含量分别比Lyx处理下林地、YnP处理下林地、对照林地提高了15％、36．01％、36．08％。植被恢复后能明显提高土壤全N、碱解N、速效P和速效K水平。0～20cm土层，Yg处理下林地全N含量较对照林地增加了12．78％，碱解N含量增加了6．19％，速效P含量增加了6．96％，速效K含量增加了6．21％。对土壤养分含量以及林分生长指标含量进行显著性分析，结果表明，每个处理林地土壤有机质、全N、碱解N含量差异不显著，但速效P含量差异显著，速效K含量差异极显著。Y取Lyx、Ynp处理林地在同一坡位的前提下，平均地径、平均树高指标差异虽均不显著，但增长量却很明显（特别是上、中坡），相较于对照林地，上坡平均地径分别提高了8.3％、9．9％、4．0％；中坡平均树高分别提高了12．0％、11.2％、6．4％。There usually are many problems including the degradation of soil fertility and the decreasing productivity for Chi- nese fir plantation. Three nodulation of seedling including Pueraria lobata （Yg）, Serissa foetida （Lyx）, Erigeron annuus （Ynp） were planted in the plot. The contents of the soil organic matter and other nutrient elements including N,P,K under different recovery modes were determined. The differences of organic matter were studied using DUNCAN method. The results showed that soil organic matter and the content of nutrient elements improved under layers with three different recovery modes in forest land whose stand age was 3a of Huangfengqiao state-owned forest farm. The content of organic matter in 0~40 cm soil from high to low was in the order of Yg processing forest land 〉Lyx processing forest land〉contrast forest land〉Ynp pro- cessing forest land. The content of organic matter in 0-20 em soil under Yg processing forest land, Lyx processing forest land, Ynp processing forest land increased 15%, 36.01%, 36.08% more than the CK. These modes significantly increased the content of the total N, hydrolytic N, available P and available K, stimulated soil fertility. The content of the total N in 0-20 cm soil increased 12.78%, the content of the hydrolytic N increased 6.19%, available P increased 6.96%, available K increased 6.21% compared with the CK. Variance analysis and multiple comparison showed that differences in content of available P and available K in each processing woodland were significant at 0.05 level or 0.01 level except for the content of organic matter, total N and hydrolytic N. The mean HT and mean DBH of each Plantation with the same slope position had no significant difference. Compared with control the mean HT of uphill incresased by 8.3%,9.9% and 4.0%, respectively. The mean DBH of slope increased 12.0%,11.2% and 6.4%, respectively.

关 键 词：杉木[Cunninghamia lanceolata(Lamb.)Hook.] 植被恢复 土壤肥力 林分生长量 

分 类 号：S791.27[农业科学—林木遗传育种]