| 基于土壤有效磷水稻磷肥施用推荐体系的探讨 |
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| 引用本文： | 邓九胜,张 炜,朱荣松,朱彩云,储亚云,李 勇.基于土壤有效磷水稻磷肥施用推荐体系的探讨[J].西北农业学报,2011,20(2):81-84. |
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| 作者姓名： | 邓九胜 张 炜 朱荣松 朱彩云 储亚云 李 勇 |
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| 作者单位： | 1. 江苏省金坛市土壤肥料技术指导站,江苏金坛,213200
2. 江苏省金坛市农林局农产品检验检测中心,江苏金坛,213200 |
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| 基金项目： | 江苏省2008年测土配方施肥项目 |
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| 摘 要： | 通过田间试验,研究水稻磷肥(P2O5)施用量与土壤有效磷(P2O5)的关系,建立磷肥推荐体系。结果表明,磷肥施用可有效提高土壤有效磷,施磷量在0~112.5 kg.hm-2,有效磷随施磷量增加而增加,施磷过量后有效磷不再提高。磷肥施用显著提高有效穗和千粒质量,使水稻增产11.4%~29%。施磷量与水稻产量呈一元二次回归关系,回归方程为y=-0.150 1x2+34.716x+7 125.6。本试验条件下,当土壤有效磷超过21.3 mg.kg-1,水稻增产效果不明显,即土壤磷临界值为21.3 mg.kg-1;每公顷土壤增加1 mg.kg-1土壤有效磷,需施入磷肥(P2O5)9.6 kg,即土壤磷临界值为9.6 kg.hm-2。应用一元二次回归方程与磷肥临界值推荐施肥,得出的适宜施磷量较为一致。
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| 关 键 词： | 有效磷 磷临界值 磷指数 水稻 |
Rice Phosphorus Fertilizer Recommendation System Study Based on Soil Available Phosphorus |
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| DENG Jiusheng,ZHANG Wei,ZHU Rongsong,ZHU Caiyun,CHU Yayun and LI Yong.Rice Phosphorus Fertilizer Recommendation System Study Based on Soil Available Phosphorus[J].Acta Agriculturae Boreali-occidentalis Sinica,2011,20(2):81-84. |
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| Authors: | DENG Jiusheng ZHANG Wei ZHU Rongsong ZHU Caiyun CHU Yayun and LI Yong |
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| Institution: | DENG Jiusheng1,ZHANG Wei2,ZHU Rongsong1,ZHU Caiyun1,CHU Yayun1 and LI Yong1(1.Soil and Fertilization Station of Jintan City,Jintan Jiangsu 213200,China,2.Agricultural Products Inspection and Detection Center of Jintan City,China) |
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| Abstract: | In order to provide a theoretical basis for rice P fertilizer,a field experiment was conducted to study the relationship between the P fertilizer application and soil available P.Results showed that P fertilizer significantly increased soil available P,P fertilizer treatments increased 58.5%-162.5% soil available P compared with non-phosphorus.Available phosphorus increased with P application in the range of 0-112.5 kg per hectare,which was marginal degression increment.P application over the range availabl... |
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| Keywords: | Soil available P Phosphate fertilizer critical value Phosphorus index Rice |
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