四川农业大学学报 ›› 2012, Vol. 30 ›› Issue (01): 24-29.doi: 10.3969/j.issn.1000-2650.2012.01.005

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川南坡地不同退耕模式土壤及枯落物持水特性

王景燕, 胡庭兴, 龚伟, 宫渊波, 罗承德   

  1. 四川农业大学林业生态工程省级重点实验室, 四川 雅安 625014
  • 收稿日期:2011-12-07 出版日期:2012-03-31 发布日期:2017-02-28
  • 作者简介:王景燕,博士,讲师,主要从事林业生态工程方面研究,E-mail:wangjingyan@sicau.edu.cn。
  • 基金资助:
    四川省教育厅项目(08ZB038,09ZB053);四川农业大学"211"工程创新团队项目资助

Water-holding Characteristics of Soil and Litter in Several Slope Farmlands with Different De-farming Patterns in Southern Sichuan Province of China

WANG Jing-yan, HU Ting-xing, GONG Wei, GONG Yuan-bo, LUO Cheng-de   

  1. Sichuan Provincial Key Laboratory of Ecological Forestry Engineering, Sichuan Agricultural University, Yaan 625014, Sichuan, China
  • Received:2011-12-07 Online:2012-03-31 Published:2017-02-28
  • Contact: 胡庭兴,硕士,教授,博导,主要从事林业生态工程研究,E-mail:hutx001@yahoo.com.cn。 E-mail:hutx001@yahoo.com.cn

摘要: 采用浸泡法对川南坡地退耕成慈竹林、杂交竹林、桤木+慈竹混交林和弃耕地5年后土壤和枯落物持水特性进行了研究。结果表明:坡地退耕后土壤自然含水量(t/hm2)、毛管持水量(t/hm2)和最小持水量(t/hm2)增加,并呈现出慈竹林 >杂交竹林 >桤木+慈竹混交林 >弃耕地 >农耕地的变化规律;4种退耕模式枯落物蓄积量(t/hm2)、自然持水量(t/hm2)、最大持水量(t/hm2)、最大拦蓄量(t/hm2)和有效拦蓄量(t/hm2)呈现出慈竹林 >杂交竹林 >桤木+慈竹混交林 >弃耕地的变化规律。枯落物持水量(g/kg)与浸泡时间的关系为Q=alnt+b,吸水速率(g/(kg·h))与浸泡时间关系为V=ktn;在枯落物持水过程中,前2h内枯落物持水作用较强。因此,林下枯落物在降雨过程前期2h对降雨的吸持具有更重要的作用和意义;慈竹林能较好地提高坡地退耕后土壤和枯落物水文生态功能。

关键词: 退耕模式, 植被恢复, 水源涵养, 持水特性

Abstract: The water-holding capacity of soil and litter was studied by the soaking method in slope farmlands in Southern Sichuan of China. Five slope farmlands with different de-farming patterns were selected, including Neosinocalamus affinis plantation(NAP), Bambusa pervariabilis×Dendrocalamopsis oldhami plantation(BDP), Alnus crenastogyne+Neosinocalamus affinis plantation(ANP), abandoned farmland(AFL), and CK. The results showed that, the soil natural water content, capillary water-holding capacity and field water-holding capacity were increased, and followed the order of NAP >BDP >ANP >AFL >CK after 5 years' de-farming. The litter stock, natural water content, maximum water-holding capacity, maximum interception and modified interception in the four de-farming patterns were also increased and followed the order of NAP >BDP >ANP >AFL. According to the regression, litter water-holding capacity and immerse time showed the relationship of Q=alnt+b, and the relationship is V=ktn between the litter water absorption speed and immerse time. High water-holding capacity and rapid absorption speed were observed at the first 2 h during the process of litter water-holding. Therefore, the results suggested that the first 2 h during rainfall was important to litter water-holding, and the NAP could better enhance the eco-hydrological functions of soil and litter compared with other de-farming patterns.

Key words: de-farming patterns, vegetation restoration, water conversation, water holding characteristic

中图分类号: 

  • S152.71