中国农业科学 ›› 2004, Vol. 37 ›› Issue (09): 1322-1327 .

• 土壤肥料.节水灌溉 • 上一篇    下一篇

滴灌施肥对石灰性土壤铁、磷有效性和番茄生长的影响

肖艳,曹一平,陈清,王敬国,魏荔   

  1. 农业部植物营养学重点实验室
  • 收稿日期:2003-11-28 修回日期:2004-04-01 出版日期:2004-09-20 发布日期:2004-09-20
  • 通讯作者: 曹一平

Citrate on Mobilization of Fe and P in Calcareous Soil and Its Impact on Growth of Drip-irrigated Tomato

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  1. 农业部植物营养学重点实验室
  • Received:2003-11-28 Revised:2004-04-01 Online:2004-09-20 Published:2004-09-20

摘要: 研究了石灰性土壤中畦灌和滴灌方式对土壤pH和有效铁、磷含量的影响。结果表明,滴灌施肥可提高水、肥生产效率,增加番茄产量。滴灌条件下根围润湿区土壤可以经常保持较高的含水量,pH高于根外非润湿区和畦灌区,其土壤有效磷的含量高,而土壤有效铁的含量较低。在滴灌施肥条件下配用一定量柠檬酸不仅可降低润湿区土壤pH,还可提高土壤有效铁含量,并增加叶片中铁、磷的含量,进而果实产量也相应地提高。

关键词: 番茄, 滴灌, 土壤有效磷, 土壤有效铁, 柠檬酸

Abstract: Differences in soil pH and DTPA extractable Fe and available P content near to emitter soil and bulk soil were investigated in the open-field experiment with drip and furrow irrigation. Results showed that drip irrigation improved marketable yield of cherry tomato with higher use efficiency of water and fertilizer. Soil available P, water content and pH value are higher in wet part soil of drip irrigation than that in non-wet part and in furrow irrigation plot. However, soil available Fe concentration decreased in drip irrigation. Adding citrate decreased soil pH, improved available Fe content in soil and increased Fe and P uptake by cherry tomato.

Key words: Tomato, Drip irrigation, Available P, Available Fe, Citrate