| 沃飞,蔡彦明,田颖,方堃.天津市不同种植年限蔬菜地土壤水分特征影响因素及其演变[J].干旱地区农业研究,2010,28(1):11~15 |
| 天津市不同种植年限蔬菜地土壤水分特征影响因素及其演变 |
| Influential factors of moisture characteristics and its changes for vegetable soil with different planting years in Tianjin City |
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| DOI：10.7606/j.issn.1000-7601.2010.01.03 |
| 中文关键词: 蔬菜地 种植年限 水分特征 影响因素 演变 天津 |
| 英文关键词:vegetable soil planting years moisture characteristics influential factor change Tianjin |
| 基金项目:中央级公益性科研院所基本科研业务费专项资金（农业部环境保护科研监测所）资助项目；农业部“948”项目“农产品产地污染预防与控制管理体系引进与建立” |
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| 中文摘要: |
| 通过对不同种植年限蔬菜地土壤饱和含水量、田间持水量、萎蔫含水量和有效含水量的分析，研究了土壤水分特征的主要影响因素及其演变趋势
。结果表明，种植5 a以上、10 a以上及15 a以上蔬菜地土壤饱和含水量的主要影响因素分别为团聚体、有机质含量、容重及pH值；田间持水量的主要影响因素分别为团聚体含量、结构系数和pH值；有效水含量主要影响因素分别为团聚体含量、结构系数及团聚体含量；萎蔫含水量影响因素不明显。随着种植年限的延长，研究区土壤饱和含水量以及田间持水量呈下降趋势，土壤持水性能、土壤水分供释及利用能力下降。 |
| 英文摘要: |
| Influential factors of moisture characteristics, including saturation water content, field capacity, wilting moisture and available water content, and its changes for vegetable soil with different planting years in Tianjin were analyzed. The results showed that saturation water content of vegetable soil with different planting years(over 5 a, over 10 a and over 15 a) were affected by aggregates contents, soil bulk densities and pH values respectively. Field capacities of them were affected by aggregates contents, structure coefficients and pH values respectively. Available water contents of them were affected by aggregates contents, structure coefficients and aggregates contents. However, influential factors of wilting moisture were not obvious. And as the increasing of vegetable planting years, soil saturation water content and field capacity were reducing. Thus, water holding and supplying abilities of soil were reducing. It needed improving water adsorption and using ability of vegetable soil, especially with longer planting years. These results can provide references for water holding and reasonable using of soil with different planting years in arid areas such as Tianjin. |
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