摘要:
应用田间试验研究永定六月红芋的氮磷钾施肥效应和适宜用量.10个试验结果表明,土壤基础肥力对芋头产量的平均贡献率为58.7%,且产量与土壤肥力水平成正相关.施用氮磷钾平均分别增产23.7%、14.9%和14.6%,达到显著水平;氮磷钾肥的平均产投比分别为10.9、11.2和6.3.氮磷钾的平均推荐施肥量为N167kghm-2、P2O574kghm-2和K2O179kghm-2,三要素比例为1:0.44:1.07,但不同土壤肥力等级的适宜用量有明显差异,与土壤速效氮磷钾水平有关.研究结果可为六月红芋测土配方施肥示范推广和配方肥生产提供科学依据.
关键词:
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六月红芋 /
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土壤 /
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氮磷钾 /
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施肥效应 /
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适宜用量
Abstract:
The responses and optimum application rate of N,P,K fertilization for Liuyuehong dasheen in Yongding County were studied by field experiments.The results of 10 tests showed that the soil conditions contributed only 58.7% on the dasheen yield.Application of N,P,K increased the yield by 23.7%,14.9% and 14.6%,respectively,on the average,at a statistically significant level.The output/input ratios on N,P and K were 10.9,11.2 and 6.3,respectively.It showed that the fertilization positively affected the yield and income.The optimum application rates were found to be N 167 kghm-2,P2O5 74 kghm-2 and K2O 179 kghm-2 for Liuyuehong dasheen,or at 1:0.44:1.07 in proportion.However,the rate differed on soil of different fertility grades,relating to the content of available nutrients in the soil.
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