| 许安民,张英利,李紫燕,周建斌,陈竹君.西安地区日光温室土壤养分与盐分累积状况研究[J].干旱地区农业研究,2007,(6):193~196 |
| 西安地区日光温室土壤养分与盐分累积状况研究 |
| Nutrient accumulation in the soils under sun-light greenhouses of Xi’an area |
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| DOI：10.7606/j.issn.1000-7601.2007.06.38 |
| 中文关键词: 日光温室栽培 土壤养分 盐分累积 |
| 英文关键词:sunlight greenhouse soil nutrient salt accumulation |
| 基金项目:西安市农业科技攻关项目(GG04094)； 西北农林科技大学科研专项(04ZM097) |
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| 中文摘要: |
| 选择西安市灞桥区新合镇的三个村的24个日光温室,对0~100 cm剖面土壤及相邻的农田土壤养分、pH和电导率进行了分析研究。结果表明:日光温室土壤有机质含量明显增加,表层(0~20 cm)平均为22.5g/kg,比农田高出9.0 g/kg;有效磷、速效钾含量出现明显的累积,表层平均分别为261 mg/kg和412 mg/kg,比露地增加569%和194%;0~40 cm剖面土壤pH与露地比较有变酸趋势,平均降低0.17个pH单位。24个日光温室0~100 cm土壤剖面硝态氮含量虽有差异,但其平均值均较露地显著增加,增加量为23.1~89.7 mg/kg;铵态氮与露地差异很小,说明施肥对日光温室土壤中铵态氮影响较小。日光温室土壤表层积盐明显,其电导率平均值高出露地1倍,但大部分尚未达到阻碍作物生长的指标。 |
| 英文摘要: |
| The contents of different nutrients in 0～100 cm soil profiles of 24 sun-light greenhouses at the suburbs of Xian were determined to evaluate the accumulation of nutrients and salts in the soils under sun-light greenhouses.The results showed that the average content of organic matter in 0～20 cm soil layer of greenhouse was 22.5 g/kg,which was significantly higher than that in the open fields.The contents of available phosphorus and available potassium in the layer of 0～20 cm of greenhouses were 261 mg/kg and 412 mg/kg,respectively,which were about 569% and 194% higher than that in the open fields,respectively. The pH in 0～40 cm soil layer of the greenhouses was 0.17 pH unit lower than that in the open fields,indicating the acidity of the soils under sun-light greenhouse.There were no significant differences in the content of NO-3-N among the 24 greenhouse soils;however,the NO-3-N in 24 greenhouse soils was significant higher than that in the open field,the increases in NO-3-N in greenhouses compared to open fields was in range of 23.1～89.7 mg/kg.There were no significant differences in the content of NH+4-N in greenhouse and open fields,indicating the stable of NH+4-N in upland soils.The electric conductivity(EC) in greenhouses was about two times as high as that in the open fields; however,the soil EC of the greenhouse was not reached the harmful level to crop in the study region. |
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