ZHENG Taihui,TANG Chongjun,XU Mingze,et al.Response of Surface Soil Water Contents to Rainfall on Red Soil Sloping Farmland Under Different Soil Conservation Measures[J].Research of Soil and Water Conservation,2020,27(05):113-119.
不同水保措施下红壤坡耕地浅层土壤水分含量对降雨的响应
- Title:
- Response of Surface Soil Water Contents to Rainfall on Red Soil Sloping Farmland Under Different Soil Conservation Measures
- 文章编号:
- 1005-3409(2020)05-0113-07
- Keywords:
- pedology; soil moisture; artificial rainfall; red soil slope farmland; peanut
- 分类号:
- S152.7
- 文献标志码:
- A
- 摘要:
- 为探明次降雨条件下花生不同生长期红壤坡耕地土壤水分含量变化对水保措施的响应,利用人工模拟降雨试验,研究采取常规耕作、有机肥+常规耕作、稻草覆盖+深翻耕、保水剂+常规耕作等措施的红壤坡耕地小区20 cm深度层土壤水分含量在次降雨过程(1.5 h)及降雨结束后1 h内的连续变化规律。结果表明:花生不同生长期红壤坡耕地上、下坡20 cm深度土壤含水量在降雨后的变化幅度均呈收获期≈结荚期>盛花期>出苗期>翻耕期(p<0.01)。稻草覆盖+深翻耕措施在提高红壤坡耕地土壤蓄水能力方面效果最显著,尤其是在花生翻耕期和收获期,增幅分别比常规耕作措施高26%和64%。保水剂对红壤坡地土壤保水效果的促进作用主要体现在花生翻耕期,而花生其他生长期则不明显; 而有机肥增施措施对红壤坡地土壤保水效果的促进作用主要体现在花生翻耕期、结荚期和收获期。研究结果表明稻草覆盖+深翻是适合红壤丘陵区坡耕地土壤水分持续高效利用的有效模式。
- Abstract:
- In order to investigate the response of soil moisture content to conservation measures on red soil sloping farmland at different growth stages of peanut under individual rainfall, simulated rainfall experiments were conducted to study the continuous variation of soil moisture content on red soil slope farmland under conventional tillage, organic fertilizer + conventional tillage, mulching + deep tillage, water-retaining agent + conventional tillage during 1.5 h rainfall process and within one hour after the end of rainfall. The results showed that the increase rates of water content in 0—20 cm soil layer on the upper and lower slopes of red soil sloping farmland at different growth stages of peanut decreased in the order: harvested stage ≈ podding stage>florescence stage>emergence stage>tillage stage(p< 0.01); the improving effect of straw mulching plus deep tillage on the soil water storage capacity of red soil sloping farmland was the most significant, especially in peanut tillage and harvest period, soil water storage was 26% and 64% higher than those of conventional tillage measures, respectively; the water conservation effect of water-retaining agent on the red soil sloping land was significant in peanut tillage period, but it was not obvious in other growth periods of peanut; the water conservation effect of organic fertilizer on the red soil sloping land was significant in peanut tillage period, pod period and harvest period. These results indicate that straw mulching plus deep ploughing is an effective model for sustainable and efficient utilization of soil moisture in sloping cultivated land in red soil hilly area.
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备注/Memo
收稿日期:2019-11-09修回日期:2019-12-09
资助项目:江西水利科技项目(KT201615,KT201720); 国家自然科学基金(41867016,41501289)
第一作者:郑太辉(1985—),男,江西黎川人,高级工程师,博士,主要从事土壤侵蚀研究工作。E-mail:ztaihui@163.com
通信作者:陈晓安(1983—),男,安徽芜湖人,高级工程师,硕士,主要从事土壤侵蚀研究工作。E-mail:onlycxa@163.com