水土保持通报2025，Vol.45Issue(2)：45-53,63,10.DOI:10.13961/j.cnki.stbctb.2025.02.006
低效杉木林林窗土壤—凋落物的持水特性
Water-holding characteristics of soil-litter at forest gap of low-efficiency Chinese fir forest
摘要
Abstract
[Objective]The water holding characteristics of soil and litter in low-efficiency of Chinese fir trees with different gap sizes and ages were investigated to provide a theoretical basis for improving the tree quality in low-efficiency Chinese fir forests.[Methods]Gap ages of 4,15,30,and 50 years were selected based on the results of the space-time substitution method,and the climax community was used as the control.Four treatments were set for each gap age:small(≤50 m2),medium(50-100 m2),and large(≥100 m2)gaps,as well as a non-gap control.The water holding characteristics of soil and litter were determined using the cutting-ring method,oven drying method,and litter soaking methods,respectively.[Results]① Only the gap age had a significant effect on the water-holding characteristics of soil and litter,whereas the gap size and the interaction between gap age and size had no significant effect.② The best soil water holding capacity was observed in the 4-year-forest gap,and the best standing crop,maximum water-holding capacity,maximum water-holding rate,natural water holding capacity,and effective storage capacity of semi-decomposed litter was observed in the 15-year-forest gap.③ The water holding rate of litter in different gap ages changed with soaking time;the middle and large gaps performed the best,and the water-holding capacity of the semi-decomposed layer was stronger than that of the undecomposed layer.④ The natural water-holding capacity of semi-decomposed litter was significantly positively correlated with soil capillary porosity,field water-holding capacity,and capillary water-holding capacity.[Conclusion]The water-holding capacity of soil and litter was good in the 4 and 15-year-forest gaps.Based on our results,the artificial opening of a medium-sized forest gap could be used as an important technical means to improve the quality of low-efficiency Chinese fir forest.关键词
杉木/林窗/低效林/土壤及凋落物/持水特性Key words
Chinese fir/forest gap/low-efficiency forest/soil-litter/water holding characteristics分类
农业科技引用本文复制引用
肖斌,姚甲宝,徐克芹,袁媛,丁颖,蔡宗明..低效杉木林林窗土壤—凋落物的持水特性[J].水土保持通报,2025,45(2):45-53,63,10.基金项目
中央级公益性科研院所基本科研业务费专项资金项目"江西大岗山典型低效公益林增效经营技术研究"(CAFYBB2020ZB002) （CAFYBB2020ZB002）
江西省自然科学基金项目(20232BAB205047) （20232BAB205047）
江西省2023年度中央财政林业科技推广示范项目(JXTG[2023]05号) （JXTG[2023]05号）
