湖北省莲藕钾肥合理用量与运筹方式研究
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国家科技支撑计划课题项目(2012BAD27B02)、湖北省农业科技创新项目(2011-620-003-03-05)和国际植物营养研究所项目(IPNI-HB-24)资助


Rational Potassium Fertilization Rates and Assignment on Rhizome Lotus in Hubei Province
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    摘要:

    采用田间小区试验研究了莲藕钾肥合理用量与运筹方式,结果表明:用线性+平台模型确定莲藕K2O临界用量为232 ~ 422 kg/hm2;根据湖北莲藕生产和施肥现状,以及藕田土壤钾素含量状况,提出湖北莲藕钾肥(K2O)合理用量为225 ~ 300 kg/hm2;钾肥运筹可采用“70% 基肥 + 30% 坐藕肥”和“50% 基肥 + 20% 立叶肥 + 30% 坐藕肥”2种分配方式,前者适用于土壤质地比较黏重的藕田,后者适用于土壤质地比较轻的藕田。

    Abstract:

    Rational potassium(K) fertilizer application rate and assignment on rhizome lotus were studied by field experiments. Results showed that the critical value of K2O application rate determined by the linear + plateau model was 232–422 kg/hm2. Taken the present status of rhizome lotus production and fertilization of farmer practice, and soil K fertility in lotus field into consideration, the rational potash application rate on rhizome lotus in Hubei Province was suggested to be 225–300 kg/hm2 K2O. Two rational K fertilizer assignment styles were proposed, one was “70% basal fertilizer +30% top-dressing in late June or early July”, the other was “50% basal fertilizer +20% top-dressing in early June + 30% top-dressing in late June or early July”. The former was suitable for lotus field with heavy soil texture, and the latter was suitable for lotus field with light soil texture.

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刘冬碧,张富林,张过师,段小丽,余延丰,吴茂前,熊桂云.湖北省莲藕钾肥合理用量与运筹方式研究[J].土壤,2014,46(2):239-244. LIU Dong-bi, ZHANG Fu-lin, ZHANG Guo-shi, DUAN Xiao-li, YU Yan-feng, WU Mao-qian, XIONG Gui-yun. Rational Potassium Fertilization Rates and Assignment on Rhizome Lotus in Hubei Province[J]. Soils,2014,46(2):239-244

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  • 在线发布日期: 2014-05-14
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