| 吉林玉米带现行耕作方式对土壤物理特性的影响 |
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| 引用本文： | 刘会青,王鸿斌,赵兰坡.吉林玉米带现行耕作方式对土壤物理特性的影响[J].安徽农业科学,2008,36(17):7328-7331. |
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| 作者姓名： | 刘会青 王鸿斌 赵兰坡 |
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| 作者单位： | 吉林农业大学资源与环境学院,吉林省生态恢复与生态系统管理省部共建国家重点实验室培育基地,吉林长春,130118 |
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| 基金项目： | 粮食丰产工程项目
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沃土工程项目资助 |
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| 摘 要： | 目的]研究吉林玉米带现行耕作制度下所形成的剖面构造特征对土壤物理特性的影响。方法]针对现行耕作制度所形成的2种"平面型"和"波浪型"剖面特征,比较了吉林省中部玉米连作黑土不同剖面构型的物理肥力特性。结果]平面型剖面构造的土壤物理肥力水平较高,其土壤结构性比波浪型剖面构型的优良。平面型犁底层剖面构造有利于改善土壤结构。相关分析表明,大于0.25mm的水稳性团聚体的含量与土壤的有机质含量及作物的产量呈显著相关,相关系数分别为0.860和0.703。在各相对湿度条件下2种土壤剖面型的吸湿水含量排序始终是平面型>波浪型(厚层黑土)>波浪型(薄层黑土)。结论]现行不合理的耕作制度是导致吉林玉米带土壤肥力退化的主要原因。
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| 关 键 词： | 吉林玉米带 玉米连作 耕作制度 土壤物理 |
| 文章编号： | 0517-6611(2008)17-07328-03 |
| 修稿时间： | 2008年4月14日 |
Effects of Current Farming Mode on the Physical Characteristics of Soil in Jilin Corn Belt |
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| LIU Hui-qing et al.Effects of Current Farming Mode on the Physical Characteristics of Soil in Jilin Corn Belt[J].Journal of Anhui Agricultural Sciences,2008,36(17):7328-7331. |
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| Authors: | LIU Hui-qing |
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| Abstract: | Objective] The research aimed to study the effects of the profile conformation characteristics of Jilin corn belt under current farming system on the physical characteristics of soil.Method] Aiming at the characteristics of 2 kinds of profiles including flat type and wavy type under current farming system,the physical fertility characteristics of different profile configuration in backland with continuous cultivation of corn in middle Jilin were compared.Result] The physical fertility level of soil with flat type profile conformation was higher and its soil structure was better than that with wave type profile conformation.The plow pan profile constitution of the flat type was favorable for improving the soil structure.The correlation analysis showed that the content of water stable aggregate with the size of more than 0.25 mm showed significant correlations with organic matter content in soil and the yield of crop,with the correlation efficient of 0.860 and 0.703 resp.The hygroscopic water content of 2 kinds of soil profile under the conditions of each relative humidity was always in order as follows:plat type>wave type(thick-layer backland)> wave type(thin-layer blackland).Conclusion] Current unreasonable farming system was the main cause that led to the degradation of soil fertility in Jilin corn belt. |
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| Keywords: | Jilin corn belt Continuous cultivation of corn Farming system Soil physical characteristics |
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