首页|沼液浇灌对茭白氮磷钾养分吸收利用特性的影响

沼液浇灌对茭白氮磷钾养分吸收利用特性的影响

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通过田间试验,研究沼液浇灌量对茭白植株不同生育期氮、磷、钾养分吸收累积以及利用效率的影响.结果表明,当沼液浇灌量为2.0倍(2.0N)和2.7倍(2.7N)对照化肥氮时,茭白植株成熟期磷和钾累积量均受到明显抑制,其中,磷积累量分别下降8.73%和42.0%,钾积累量分别下降16.4%和34.1%;氮累积量仅在2.7N处理时受到明显抑制.2.ON和2.7N处理使茭白植株不同生育期茎秆和叶片氮磷含量整体呈增加趋势,其中2.7N时尤为明显,然而钾含量反而下降.茭白氮含量随沼液浇灌量增加而增加,钾含量呈先增后降趋势,磷含量变化较为稳定.沼液浇灌处理均抑制了茎秆磷转运,但却促进了茎秆和叶片钾转运.另外,2.0N和2.7N处理明显抑制了叶片氮转运.因此,沼液浇灌能够影响茭白植株对氮、磷、钾养分的吸收累积特性,改变利用效率.适量浇灌有利于提高茭白养分利用效率.
Effect of biogas slurry application on N, P and K uptake and utilization characteristics of Zizania latifolia
A filed experiment was conducted to study the effect of biogas slurry application on N,P and K accumulation at different growth stages and utilization rate of Zizania latifolia.It was shown that P and K accumulation at maturity stage were suppressed obviously under treatments of 2.ON and 2.7N,in which the application rate of biogas slurry were 2.0 and 2.7 times the application rate of chemical nitrogen in control (CK) treatment.Compared to CK,P and K accumulation was decreased by 8.73% and 42.0%,and 16.4% and 34.1%,respectively,under these two treatments.N accumulation at maturity stage was decreased significantly only under 2.7N treatment.N and P concentrations in stems and leaves of Zizania latifolia during whole growth stage showed a rising trend generally under 2.ON and 2.7N treatments,especially for 2.7N,which were contrary to K.N concentrations in edible parts of Zizania latifolia were increased with the increase of biogas slurry application rates.K concentrations were increased firstly and then decreased.However,P concentrations kept relatively stable.Biogas slurry application could restrain P translocation in stems,but promote K translocation in both stems and leaves.In addition,2.ON and 2.7N treatments significantly reduced N translocation in leaves.In conclusion,biogas slurry application could affect N,P and K uptake and accumulation in Zizania latifolia and alter nutrient utilization efficiency.Reasonable application rate shall be beneficial to increase nutrient utilization efficiency.

Zizania latifoliabiogas slurryNPK

陈贵、赵国华、张红梅、沈亚强、杨继锋、冯四海、陈小忠、程旺大

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嘉兴市农业科学研究院农业生态环境研究室,浙江嘉兴314016

嘉兴学院生物与化学工程学院,浙江嘉兴314001

桐乡市石门镇农业经济服务中心,浙江桐乡314512

嘉兴市南湖区金禾粮油专业合作社,浙江嘉兴310041

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茭白 沼液

嘉兴市科技计划项目嘉兴市科技局重点项目

2014AZ21005市2011AZ1018

2016

浙江农业学报
浙江省农业科学院 浙江省农学会

浙江农业学报

CSTPCDCSCD北大核心
影响因子:0.765
ISSN:1004-1524
年,卷(期):2016.28(3)
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