摘要
对橡胶-大叶千斤拔复合生态系统和橡胶纯林进行连续3 a的对比观测研究,结果表明在橡胶林里种植大叶千斤拔能促进橡胶生长,橡胶平均基径、平均胸径和平均树高分别比橡胶纯林高出11.0%、9.62%和3.78%。与橡胶纯林相比,混作后土壤含水量的季节变化较为缓和且旱季含水量较高;且0～10 cm和10～30 cm的土壤容重每年分别约下降0.03 g/cm3和0.01～0.02 g/cm3。随着种植年限的增加,土壤中有机质、全氮、全磷、全钾含量都呈现出先降后升的趋势,而在对照中土壤有机质、全氮、全磷、全钾含量均呈现不断下降的趋势。表明混作后植物的生长及土壤养分状况比橡胶纯林都有所改善。
This paper presents the comparison of dynamics on the plant growth, and soil moisture and nutrient be- tween the rubber plantation and rubber-Flerningia rnacrophylla agroforestry system which was a new constructed agroforestry model. The average base diameter, average diameter at breast height （DBH） and average height of the rubber tree in rubber-F, macrophylla agroforestry system increased by 11.0 %, 9.62 % and 3.78 % as much as the rubber plantation, respectively. Moreover, higher soil moisture in dry season and less seasonal fluctuation were observed in rubber-F, macrophylla agroforestry system than those in rubber plantation. The content of soil organic matter （SOM）, total nitrogen （T. N）, total phosphorus （T. P） and total potassium （T. K） declined in the second year and then increased in the third year, soil bulk density decreased to 0.03 g / cm3 and 0. 01 -0.02 g / cm3 at 0-10 cm and 10 -30 cm layer for each year in rubber-F, macrophyUa agroforestry system, respectively. But in rubber plantation, SOM, T. N, T. P, T. K declined and soil bulk density increased with planting ＇years. The results indicated that the growth of the rubber tree and the soil moisture and nutrient content were improved in rubber-F. macrophyUa agroforestry system which demonstrated that it was an effective way for restoring the degraded tropical mountain land and for sustainable development of rubber monoculture.
出处
《山地学报》
CSCD
北大核心
2009年第4期433-441,共9页
Mountain Research
基金
中国科学院农业项目办公室项目
云南省省院省校科技合作计划项目(2006XY38)~~
关键词
农林复合系统
土壤水分
容重
土壤养分
agroforestry
rubber plantation
soil moisture content
soil bulk density
soil nutrient content
Xishuangbanna
