山西天镇设施菜地土壤养分状况分析

发布时间：2018-06-04 16:50

本文选题：设施菜地 + 土壤养分　；参考：《中国瓜菜》2017年05期

【摘要】：为了研究山西天镇设施菜地土壤养分状况,以设施菜地相邻大田土壤为对照,选择当地有代表性的设施大棚21个,采用"S"型五点式采样,采集0~20 cm土壤样品进行分析化验。结果表明,与对照相比,天镇县设施菜地土壤p H值较对照(8.26)降低了1.5~2.5,出现了明显酸化趋势;土壤有机质质量分数平均为15.41 g·kg~(-1),整体含量偏低,导致土壤养分得不到合理利用;土壤全氮质量分数在0.4~0.6 g·kg~(-1),有效磷质量分数小于30 mg·kg~(-1),依据菜地土壤养分分级标准,氮磷含量均属于严重缺乏;土壤速效钾质量分数大于200 mg·kg~(-1),超过了作物需求量,后期应严格控制钾肥施用量。总之,当地设施蔬菜生产中的不合理施肥,已导致土壤养分供应与蔬菜养分需求严重失调,今后应推广科学施肥。
[Abstract]:In order to study the soil nutrient status of the protected vegetable field in Tianzhen, Shanxi Province, 21 representative greenhouse soils were selected as control, and the samples of 020 cm soil were collected and analyzed by "S" type five-point sampling. The results showed that compared with the control, the pH value of vegetable soil in Tianzhen County decreased by 1.5 ~ 2.5, and the soil organic matter content was 15.41 g / kg 路kg ~ (-1) on average, which resulted in the soil nutrient not being used reasonably, and the soil organic matter content was 15.41 g 路kg ~ (-1) 路kg ~ (-1) ~ (-1) ~ (-1). The total nitrogen content of soil was 0.4 ~ 0.6 g 路kg ~ (-1) N ~ (-1), the mass fraction of available phosphorus was less than 30 mg 路kg ~ (-1) N ~ (-1), according to the soil nutrient classification standard of vegetable field, the content of nitrogen and phosphorus was seriously lacking, and the mass fraction of soil available potassium was more than 200 mg 路kg ~ (-1) ~ (-1), which exceeded the crop demand. The amount of potash fertilizer should be strictly controlled in the later period. In short, unreasonable fertilization in vegetable production in local facilities has resulted in a serious imbalance between soil nutrient supply and vegetable nutrient demand. Scientific fertilization should be promoted in the future.
【作者单位】：山西大同大学生命科学学院;
【基金】：山西大同大学科研项目(2015K6)
【分类号】：S158;S626

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