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[目的]减少丘陵坡地雨季地表径流造成的肥水损失,增加干旱季节土壤墒情提供科学数据。[方法]通过多因子复配试验明确复合保水型有机物料的施用比例,对土壤水分特征曲线变化进行测试,分析土壤持水特性及水分有效性。[结果]不同复配比例处理的土壤初始含水量均有所提高,当保水剂用量为土壤重量的0.4%和0.6%时土壤含水量分别达到69.0%和70.5%,与对照(S0.0)相比有显著性差异。各处理脱水期都有所延长,与对照组相比(张力值92.7 Kpa时)脱水天数延长了4.6~14d。[结论 ]保水剂和有机物料配合施用可改善丘陵荒坡地土壤的吸水持水性能,调整复配比例可获得不同初始水分含量和脱水周期,可根据当地的土壤肥力情况、作物种类、灌溉条件进行复配以满足作物生长对肥水的需求。
[Objective] The research aimed to provide scientific data for reducing fertilizer and water losses caused by surface runoff in rainy seasons on hillsides and increasing soil moisture in dry season. [Method] The multi-factor complex test was used to confirm the application ratio of composite water-retaining organic materials. The soil water characteristic curves were tested for changes and the soil water retention characteristics and water availability were analyzed. [Result] The results showed that the initial soil moisture content increased with different proportion of compounding treatment. Soil water content reached 69.0% and 70.5% respectively when the amount of water retaining agent was 0.4% and 0.6% of soil weight, respectively. Compared with the control (S0.0) Compared to significant differences. The dehydration period of each treatment was extended, compared with the control group (tension value of 92.7 Kpa) dehydration days extended 4.6 ~ 14d. [Conclusion] The application of water-retaining agent and organic material could improve the water-holding capacity of soil in hillside slopes. Different initial moisture content and dehydration period could be obtained by adjusting the compounding ratio, which could be based on the local soil fertility, crop species and irrigation conditions Compounded to meet the crop growth on fertilizer demand.