影响晋宁设施蔬菜产量的主要土壤因子分析

发布时间：2018-06-05 19:47

本文选题：设施蔬菜 + 蔬菜产量　；参考：《云南农业大学学报(自然科学)》2017年01期

【摘要】：以云南省晋宁县5年的设施蔬菜土壤为研究对象,采用野外调查、化学分析与数理统计相结合的方法,对设施菜地各土层(0~10 cm,10~20 cm和20~30 cm)的土壤养分、理化性质及其与产量的关系进行初步研究,探讨限制设施蔬菜产量的主要土壤因子。结果表明:(1)大棚菜地土壤养分含量呈明显的上高下低型垂直分布,其中0~10 cm土层养分含量大量积累,设施土壤酸化、次生盐渍化主要集中在0~20 cm土层;(2)供试土壤pH与作物产量呈极显著正相关(n=39,r=0.462**),EC与作物产量呈极显著负相关(n=39,r=-0.448**),故土壤pH、EC是限制该区域设施蔬菜产量的主导因子;(3)氮肥投入量与土壤pH呈极显著负相关(n=39,r=-0.759**),与土壤EC呈极显著正相关(n=39,r=0.802**),表明氮肥投入量的增加,加速了设施蔬菜土壤酸化和次生盐渍化的进程。因此,为缓解土壤酸化和次生盐渍化,保证设施蔬菜生产的可持续发展,建议该区域减少化肥(尤其是氮肥)投入量,增施有机肥。本研究可为设施蔬菜生产的养分管理及土壤可持续利用提供参考依据。
[Abstract]:The soil nutrients of greenhouse vegetable soil in Jinning County, Yunnan Province, were studied by field investigation, chemical analysis and mathematical statistics. The soil nutrients of 10 ~ 10 cm ~ (10 cm) ~ 10 cm ~ (20 cm) and 20 ~ 30 cm ~ (30 cm) of soil layer in greenhouse vegetable field were studied by means of field investigation, chemical analysis and mathematical statistics. The physicochemical properties and the relationship between physical and chemical properties and yield were studied, and the main soil factors limiting the yield of greenhouse vegetables were discussed. The results showed that the soil nutrient content in the greenhouse was significantly higher than that in the lower one, and the nutrient content in the 0 ~ (10 cm) soil layer accumulated a lot, and the soil acidified in the facility. Secondary salinization was mainly concentrated in 0 ~ 20 cm soil layer.) there was a very significant positive correlation between soil pH and crop yield. There was a very significant negative correlation between EC and crop yield. Therefore, soil pH EC is the main factor limiting vegetable yield in this area. There was a very significant negative correlation between the input load and soil pH, and a very significant positive correlation between input load and soil EC, indicating the increase of nitrogen input. The process of soil acidification and secondary salinization was accelerated. Therefore, in order to alleviate soil acidification and secondary salinization and ensure the sustainable development of protected vegetable production, it is suggested that the amount of chemical fertilizer (especially nitrogen fertilizer) should be reduced and organic fertilizer should be applied in this area. This study can provide reference for nutrient management and soil sustainable utilization of vegetable production.
【作者单位】：云南农业大学资源与环境学院;西南林业大学校长办公室;
【基金】：公益性行业(农业)科研专项基金项目(201103003,201103004) 云南省省级生态建设专项资金项目(A3007501) 云南农业大学第八届学生科技创新创业行动基金项目资助(2015ZKX056)
【分类号】：S626;S151.9

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