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。
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.
出处
《中国农业科学》
CAS
CSCD
北大核心
2004年第9期1322-1327,共6页
Scientia Agricultura Sinica
基金
国家"863"高科技产业化资助项目(2001AA246062)
