应用生态学报2018，Vol.29Issue(4)：1147-1155,9.DOI:10.13287/j.1001-9332.201804.006
林地覆盖经营对雷竹生物量及土壤肥力的影响
Effects of mulching management on biomass of Phyllostachys praecox and soil fertility
摘要
Abstract
We analyzed the dynamics of stand growth and soil nutrient availability during the degradation processes of Phyllostachys praecox plantation,taking the advantage of bamboo forest stands with different mulching ages (0,3,6,9 and 12 a).The results showed the aboveground and belowground biomass of bamboo forest reached the maximum value when they were covered by three years,which was significantly increased by 14.6％ and 146.6％ compared with the control.The soil nutrient content was affected by the mulching age and soil layer.Soil nutrients gradually accumulated in upper layer.Soil organic carbon and total nitrogen content were increased with the increases of coverage years.The soil total phosphorus content at different soil layers showed a trend of decreasing first and then increasing.It was the lowest level in the surface layer (0-20 cm) and the bottom (40-60 cm) in 6 years,and the subsurface (20-40 cm) soil reached the lowest level in three years.The total potassium content kept increasing in 0-20 cm soil layer,but decreased during the first three years of mulching and then increased in 20-60 cm soil layer.The comprehensive index of soil fertility quality was greatly improved after nine years mulching,with fertility of subsurface soil being better than that of surface and bottom soils.There was no relationship between the soil fertility index and biomass of different organs in bamboo in the different mulching ages.In the subsurface,however,nitrogen content was negatively related to leaf biomass and potassium was negatively correlated with the biomass of leaves and whip roots.Our results indicated that excessive accumulation of soil nutrients seriously inhibited the propagation and biomass accumulation of P.praecox after long-term mulching management and a large amount of fertilizer,which further aggravated the degradation of bamboo plantation.关键词
覆盖经营/雷竹林/生物量/土壤肥力Key words
mulching management/Phyllostachys praecox forest/biomass/soil fertility引用本文复制引用
翟婉璐,杨传宝,张小平,高贵宾,钟哲科..林地覆盖经营对雷竹生物量及土壤肥力的影响[J].应用生态学报,2018,29(4):1147-1155,9.基金项目
本文由国家林业公益性行业科研专项(201504407)资助 （201504407）
This work was supported by the National Special Fund for Forest Scientific Research in the Public Welfare (201504407). （201504407）
