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Zheng X.
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Zheng HJ, Zhao YM, Wu XF, Xu H, Jia Q.
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不同施氮措施条件下,对保护地黄瓜生育期内氮素吸收利用效率、氮素淋洗损失进行了研究,同时也研究了不同处理对黄瓜产量及品质的影响。试验结果表明,传统施肥处理(2100kg/hm^2)与推荐施肥处理(900kg/hm^2)之间氮素吸收量没有显著差异,传统施肥处理中大量的氮肥没有用于促进黄瓜对养分的吸收利用,其氮肥利用率、农学利用率以及生理利用率都很低,每千克纯氮增产只有2.06kg,91.65%的氮素以各种途径被损失掉,其中土壤硝态氮淋洗是主要形式。同时研究发现,传统施肥处理过量氮肥施用阻碍其它营养元素的吸收,
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