ISWC OpenIR  > 水保所知识产出(1956---)
添加生物炭对黄绵土耕层土壤可蚀性的影响
吴媛媛1,3; 杨明义1,2; 张风宝1,2; 张加琼1,2; 赵恬茵2
2016
Source Publication土壤学报
Volume53Issue:1Pages:81-92
Abstract

生物炭因其固有的特性和理化性质成为新兴的土壤结构改良添加剂,目前大多研究集
中在添加生物炭后土壤理化性质及作物产量变化方面,而对添加生物炭后土壤抗侵蚀效应变化的研
究很少。以黄土高原典型黄绵土为例,采用室内人工模拟降雨试验,研究添加不同含量(0%、1%、
3%、5%、7%)和粒级(<2 mm、<1 mm、<0 . 2 5 mm)的生物炭对坡面片蚀的影响。结果表明:
(1)生物炭含量、生物炭含量与粒级的交互作用对降雨侵蚀有显著影响,生物炭粒级对侵蚀的影响效
应相对较弱。(2)各次降雨中,添加1%含量的各粒级生物炭均可产生减流减沙作用,探讨其他含量
的生物炭对侵蚀和径流的影响时需结合生物炭的粒级进行具体分析。(3)产流时间随生物炭含量的增
加而减小,且≤3%的生物炭添加量可延迟产流时间。

Other Abstract

The Loess Plateau is one of the areas that suffer the most serious soil erosion and the soil in
the area is characterized by low soil fertility and high soil e rodibility. Thanks to its inherent characteristics and
physicochemical properties,biochar has become a novel soil structure amendment. However,so far studies
on biochar have mostly focused on its effects of improving soil physical and chemical properties and plant
growth conditions,reducing greenhouse gas emission and remedying polluted soil,and demonstrated that
its positive effects on soil quality,soil bulk density,soil porosity,quantity and structure of soil aggregate
and soil water dynamics. Little has been reported on its effects on soil resistance to erosion. Getting to know
the effects of biochar on soil erosion will be of great significance not only to soil and water conservancy,butalso to soil building and crop yield. An indoor artificial rainfall experiment was carried out to explore effect of
biochar on sheet erosion on loessal soil slope. The experiment was designed to have one rainfall intensity(90
mm h-1),five application rates(0%,1%,3%,5% and 7%)and three particle sizes(<2mm,<1mm
and <0.25mm)of biochar of sawdust. Results show that the effect of biochar application on erodibility of
loessal soil plow layers is attributed mainly to its effects altering composition and porosity of the soil and the
effect of its own properties on water,which were embodied in delayed runoff and reduced runoff and sediment
yields and sediment in runoff. Incorporation of biochar,the same in particle size,shortened the duration
of runoff and the effect intensified with rising application rate of biochar. However,when the application
rate was lower than 3%,it delayed runoff,but when the rate went on rising,it affected runoff reversely.
Incorporations of biochar,the same in rate,but different in particle size,did not show much difference
in affecting time of runoff yield. Incorporation of biochar of any size at a rate of 1% demonstrated runoff and
sediment reducing effects in every rainfall event. So,in exploring effects of biochar application rate on runoff
and sediment yields,it is essential to take into account particle size of the biochar. Biochar application rate,
biochar particle size,interaction of the two elements and other uncontrollable factors were responsible for
21.35%,7.27%,41.19% and 30.20%,respectively,of the variation of runoff yield brought about by rainfall
and for 32.9%,8.66%,35.21% and 23.23%,respectively,of the variation of sediment content in runoff.
As the biochar particle size does not have much influence on soil erodibility and sediment yield,biochar
application rate,interaction between content and particle size of the biochar,and other uncontrollable
factors,are the factors contributing 37.16%,34.46% and 28.38%,respectively,to variation of soil
erodibility and 32.48%,35.59% and 31.94%,respectively,to variation of erosion. Obviously,biochar
application rate and interaction between content and particle size of the biochar are major factors affecting
rainfall erosion significantly,and particle size of biochar is a minor one. Though this study is a small scale
research on mechanism of biochar affecting soil erosion,the findings in this study may serve as reference of
scientific significance to large -scale researches on effect of biochar on soil erosion in future .

Keyword片蚀 土壤可蚀性 生物炭 黄土坡面
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8687
Collection水保所知识产出(1956---)
Affiliation1.中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
2.西北农林科技大学水土保持研究所
3.中国科学院大学
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
吴媛媛,杨明义,张风宝,等. 添加生物炭对黄绵土耕层土壤可蚀性的影响[J]. 土壤学报,2016,53(1):81-92.
APA 吴媛媛,杨明义,张风宝,张加琼,&赵恬茵.(2016).添加生物炭对黄绵土耕层土壤可蚀性的影响.土壤学报,53(1),81-92.
MLA 吴媛媛,et al."添加生物炭对黄绵土耕层土壤可蚀性的影响".土壤学报 53.1(2016):81-92.
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