安徽农业科学2016，Vol.44Issue(28)：150-153,156,5.
桂西北5种退耕还林林分枯落物的持水特性
Water-Holding Characteristics of Five Types of Forest Litters of Returning Farmland to Forest in Northwest Guangxi
摘要
Abstract
Objective] To provide the theoretical basis for ecological construction of returning farmland to forest in rocky desert area of north-west Guangxi.[ Method] Stand volume and water-holding characteristics of five types of forest litters of returning farmland to forest were re-searched in northwest Guangxi.[ Result] Total stand volume of five types of forest litters were in the order of Eucalyptus urophylla (11.59 t/hm2 ) >Zenia insignis(7.99 t/hm2 ) >Juglans regia (7.71 t/hm2 ) >Castanea mollissima(7.14 t/hm2 ) >Toona sinensis(3.70 t/hm2 ) .Water holding capacities of five types of forest litters were basically consistent,which were in the order of Toona sinensis >Castanea mollissima >Zenia insignis >Eucalyptus urophylla >Juglans regia.The water-holding capacity of the semi-decomposed litter was greater than that of the undecomposed litter.Water-holding capacity of the forest litter increased with the time prolonged.Semi-decomposed litter in-creased rapidly at 2 h; and undecomposed litter enhanced greatly when soaked for 4 h,and then entered into stable stage.Water absorption rate of the forest litter decreased as time prolonged.In the first 2 h,both the water absorption rate of semi-decomposed and undecomposed litter were the fastest.In 2-8 h after soaking,the rate gradually decreased.The rate declined slowly after 8 h.The effective interception rate of dif-ferent forest litters were in the order of Eucalyptus urophylla(36.89 t/hm2 ) >Castanea mollissima(26.65 t/hm2 ) >Zenia insignis(23.19 t/hm2) >Toona sinensis (16.64 t/hm2) >Juglans regia (15.36 t/hm2).[Conclusion] Eucalyptus urophylla has relatively great stand volume and effective holding capacity.During the construction of water conservation and soil and water conservation in future,we should increase the planting of Eucalyptus urophylla.关键词
退耕还林/林下枯落物/持水特性Key words
Returning farmland to forest/Forest litters/Water-holding characteristics分类
农业科技引用本文复制引用
宋飞,吴立素,申庆海,庄嘉..桂西北5种退耕还林林分枯落物的持水特性[J].安徽农业科学,2016,44(28):150-153,156,5.基金项目
广西壮族自治区林业厅资助项目（20120897）。 （）
