深沟造林条件下秸秆覆盖对土壤养分和盐分变化的影响

为了综合分析深沟造林条件下秸秆覆盖对土壤养分和盐分的影响,该研究于2008-2012年在新疆塔城盆地老风口生态区新植林地进行了4 a定位试验,设置了3个处理,即深沟70 cm秸秆覆盖、深沟70 cm不覆盖和常规（不深沟不覆盖）,分析了这3种处理在2008-2012年间的土壤养分和盐分的变化特征。结果表明：4 a后,深沟秸秆覆盖条件下土壤容重降低9.7%~24.9%,孔隙度提高11.2%~20.2%,饱和持水率增加13.0%~24.6%,土壤有机质质量分数增加24.48%。土壤容重、孔隙度、饱和持水率、养分含量改善情况均为：深沟秸秆覆盖〉深沟秸秆不覆盖〉常规。深沟秸秆覆盖条件下土壤表层（0~20...

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Bibliographic Details
Published in农业工程学报 Vol. 31; no. 12; pp. 165 - 172
Main Author 鲁天平 史征 刘永萍 田云峰 吴圣华
Format Journal Article
LanguageChinese
Published 新疆林科院造林治沙研究所,乌鲁木齐,830063%新疆塔城地区林业科学研究所,塔城,834700%新疆林业厅治沙办,乌鲁木齐,830000 2015
Subjects
土壤
土壤养分
深沟秸秆覆盖
盐分
秸秆
覆盖模式
soil nutrients
秸秆
覆盖模式
土壤养分
straw mulching in deep groove
盐分
coverage mode
straws
soils
深沟秸秆覆盖
土壤
salts
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2015.12.022

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Summary:为了综合分析深沟造林条件下秸秆覆盖对土壤养分和盐分的影响,该研究于2008-2012年在新疆塔城盆地老风口生态区新植林地进行了4 a定位试验,设置了3个处理,即深沟70 cm秸秆覆盖、深沟70 cm不覆盖和常规（不深沟不覆盖）,分析了这3种处理在2008-2012年间的土壤养分和盐分的变化特征。结果表明：4 a后,深沟秸秆覆盖条件下土壤容重降低9.7%~24.9%,孔隙度提高11.2%~20.2%,饱和持水率增加13.0%~24.6%,土壤有机质质量分数增加24.48%。土壤容重、孔隙度、饱和持水率、养分含量改善情况均为：深沟秸秆覆盖〉深沟秸秆不覆盖〉常规。深沟秸秆覆盖条件下土壤表层（0~20 cm）盐分降低35.7%,底层（≥40~70 cm）土壤盐分降低2.9%,而深沟不覆盖盐分降低不显著。该研究表明,深沟秸秆覆盖改善了土壤结构、提高土壤养分、抑制蒸发和盐分表聚,为树木的正常生长提供了有利条件。
Bibliography:11-2047/S
Lu Tianping, Shi Zheng, Liu Yongping, Tian Yunfeng, Wu Shenghua（ 1. Xinjiang Academy of Forestry Institute of Afforestation and Sand Control, Urumqi 830063, China; 2. Xinjiang Tacheng Forestry Science Institute, Tacheng 834700, China; 3. Xinjiang Provincial Sand Prevention Office, Urumqi 830000, China）
soils; straws; salts; coverage mode; soil nutrients; straw mulching in deep groove
In order to provide theoretical basis for the sustainable utilization of desert sand gravel soil,we studied the effects of straw mulching on the nutrients and salt in the soil under the condition of deep trench planting and assessed the capabilities of straw mulching such as soil nutrients accumulation,inhibiting soil evaporation and soil salt accumulation in surface soils.Field experiments were conducted in Laofengkou ecological zone located in the Tacheng basin of Xinjiang.The total experimental area was 10 000 hm2,where grooves were excavated parallelly by using mini excavators according to contour lines.The spacing bet
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2015.12.022