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提高福建茶园土壤肥力质量的技术途径

         

摘要

Effects of soil fertility and fertilization on the tea plantations in Fujian were discussed. With the generous applications of fertilizers, almost no tea plantations were found to be deficient in N. Some even substantially surpassed the threshold amount. The cases of P and K deficiencies were declining, as the lack of K continued to be pronounced in the region. The amounts of Pb and Hg in the soil were more than average. The available Mn and Cu in certain areas were rather low. The appropriate rate of N fertilization for a tea plantation was 185. 0 - 350 kg · km-2, while N : P : K ratio to be 2 : 1 : 1. By combing organic and synthetic fertilizers, superior results were obtained as compared to using the synthetic fertilizer alone. Based on the current status, some possible means to improve the soil feritilty in the province through the construction of appropriate farming system, establishment of adequate irrigation and drainage projects, and/or application of grass mulching, agricultural wastes recycling and green manure were proposed.%总结福建省茶园土壤肥力现状和施肥效应得出:由于化肥特别是氮肥的大量施用,全省茶园已基本不存在缺氮现象,部分地区含量大大超过环境临界值;磷、钾的缺乏也有所减轻,但缺钾现象仍然十分突出;茶园土壤Pb、Hg含量稍高于福建省土壤背景值,部分地区茶园有效锰、有效铜较欠缺;茶园施N量185.0~350kg·km-2,N∶P∶K比例以2∶1∶1为宜,配合施用适量有机肥效果最佳.针对福建省茶园土壤肥力条件现状、存在的问题及其施肥效应,从推行合理科学耕作技术、合理设置排灌工程和铺草覆盖、农用废弃有机物还茶、茶园绿肥种植模式等方面提出了提高茶园土壤肥力的技术途径.

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