| 邹洪涛，王胜楠，闫洪亮，马迎波，范庆锋，黄 毅，张玉龙.秸秆深还田对东北半干旱区土壤结构及水分特征影响[J].干旱地区农业研究,2014,32(2):52~60 |
| 秸秆深还田对东北半干旱区土壤结构及水分特征影响 |
| Effects of straw deep returning on soil structure moisturein semiarid region of Northeast China |
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| DOI：10.7606/j.issn.1000-7601.2014.02.009 |
| 中文关键词: 秸秆深还田 土壤结构 团聚体 水分特征 |
| 英文关键词:straw deep returning soil structure soil aggregate particle soil moisture |
| 基金项目:农业部公益性行业专项（201303125，200903007）；国家科技支撑计划项目（2012BAD05B01，2011BAD09B02）；国家973项目（2011CB100502）；辽宁省科技农业攻关重大项目（2011213001） |
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| 中文摘要: |
| 采用定位田间小区试验方法，研究秸秆深还田对东北半干旱区农田土壤结构和土壤水分特征的影响。结果表明，秸秆深还田能够有效地改良土壤结构和土壤水分分布状况。秸秆深还田第3年土壤0～50 cm层对照处理容重为1.45 g·cm-3，各处理的平均容重为1.34 g·cm-3，土壤容重显著减小；干筛团聚体以＞5 mm团聚体增加为主占18.69%～27.20%，抵抗外力破坏而保持原有形态的能力增强；平均重量直径及几何平均直径均较对照和深耕有所提高；施入秸秆量800 kg·667m-2处理的水稳性团聚体稳定率和土壤结构体破碎率降低最为明显。不同处理之间表现出秸秆深还田处理的持水量要高于对照处理。 |
| 英文摘要: |
| A field experiment was conducted to explore the effects of strawdeep returning on soil structure and moisture in semiarid region of Northeast China. Results indicated a marked influence of straw deep returning on soil structure and moisture distribution. Soil bulk density of the control treatment of three-year returning was 1.34 g·cm-3. The average bulk density of each treatment was 1.34 g·cm-3. Soil bulk density decreased significantly, in particular >5 mm aggregate particles accounting for 18.69%～27.20%. Results revealed improved ability to resist external force damage, increased mean weight diameter and geometric and reduction of water-stable aggregates
stability rate and soil structure breakage for the treatment of returning 800 kg·hm-2. In addition, soil water holding capacity was higher than the control treatment. |
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