小兴安岭低质林采伐改造后枯落物持水特性变化分析  

Analysis about Change of Water-holding Characteristic of Litter Layer after Logging Reform in Low-quality Forest Stands of Lesser Khingan Range

作　　者：郭辉[1] 董希斌[1] 蒙宽宏 范煜婷[3] 

机构地区：[1]东北林业大学森林持续经营与环境微生物工程黑龙江省重点实验室,哈尔滨150040 [2]黑龙江林业科学研究所,哈尔滨150081 [3]中国科学院新疆生态与地理研究所,乌鲁木齐830011

出　　处：《林业科学》2010年第6期146-153,共8页Scientia Silvae Sinicae

基　　金：黑龙江省重大科技攻关项目"低质林结构优化与功能调控技术研究与示范"(GA07B301-05);东北林业大学研究生论文资助项目

摘　　要：枯落物层是由林分落下的茎、叶、枝条、芽、鳞片、花、果实、树皮等的凋落物及动物残体组成（杨吉华等,2003）,是森林地表的重要覆盖层和保护层,它对林地土壤的水热状况和林地水文生态特性有重要的影响（吴钦孝等,1998;祁萃萃等,2008;Tamaietal.,1998;Ondaetal.,1994）。枯落物不但具有防止雨滴击溅土壤、改良土壤、拦蓄渗透降水、分散滞缓地表径流、补充土壤水分等作用。Litter amount and the water-holding characteristic of litter layers were analyzed after logging in low-quality forests in Lesser Khingan Range with different logging styles. The results showed that： the litter amount and the maximum water-holding capacity of the nondecomposed litter were greater than the semi-decomposed litter in the horizontal clearcutting zone. At 10th mether of band width,the litter amount was the largest,but there nosignificant difference in the maximum water holding capacity. The litter amount and the maximum water-holding capacity of the non-decomposed litter were greater than the semi-decomposed litter in the vertical clear-cutting zone,but there was no significant difference in the litter amount and the maximum water-holding capacity between different band widths. The litter amount and the maximum water-holding capacity was large in the light selective-cutting zone. The total amount of litter was 20. 68,10. 73, 13. 34,1. 49 t·hm^ -2 in the horizontal clear-cutting zone,the vertical clear-cutting zone,the selective -cutting zone and the check zone,and the maximum water-holding capacity was 45. 25,81. 68,29. 58,75. 56 t·hm ^-2. The order of the total litter amount was： the check zone 〉the horizontal zone 〉the selective -cutting zone〉 the vertical zone,the nondecomposed litter： the horizontal zone 〉the check zone〉 the selective -cutting zone 〉the vertical zone,the semidecomposed litter： the check zone 〉the selective -cutting zone 〉the horizontal zone 〉the vertical zone; The order of the maximum water-holding capacity was： the vertical zone 〉the check zone t〉he horizontal zone 〉the selective cutting zone,the nondecomposed litter： the vertical zone 〉the check zone 〉the horizontal zone 〉the selective -cutting zone,the semi-decomposed litter： the check zone〉 the vertical zone 〉the horizontal zone 〉the selective -cutting zone. As time went on water-holding capacity of litter increased,however water absorption speed reduced. In summery Logging op

关 键 词：低质林 采伐方式 枯落物 持水性能 

分 类 号：S714.7[农业科学—林学]