| 浙中红壤油菜田供钾特性和钾肥用量研究 |
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| 引用本文： | 吕晓男,陆允甫.浙中红壤油菜田供钾特性和钾肥用量研究[J].土壤通报,2000,31(5):228-231. |
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| 作者姓名： | 吕晓男 陆允甫 |
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| 作者单位： | 浙江省农科院土肥所,浙江杭州,310021 |
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| 基金项目： | 国家重点基础研究发展规划项目资助(G1999011809) |
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| 摘 要： | 通过多点田间试验研究红壤性水田油菜供肥特性和钾肥施用量 .1 8个田间试验施钾油菜籽增产幅度为 7.5～ 90 .8kg/亩 ,无钾区相对产量变幅为 48.2～ 93.1 % .1mol/LNH4OAc提取的土壤速效钾含量与无钾区相对产量之间达极显著相关 ,相关系数为 0 .6 44 9 (n =1 8) .土壤速效钾的“临界水平”为80mg/kgK ,能满足 95 %相对产量的“足够水平值”为 1 5 0mg/kgK ,系统研究平衡施肥法中各参数的确定 ,并用平衡施肥法和施肥曲线确定油菜钾肥合理用量 ,两种方法具有可比性
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| 关 键 词： | 红壤性水田 油菜 供肥特性 测土施肥 |
| 文章编号： | 0564-3945(2000)05-0228-04 |
| 修稿时间： | 1999年1月29日 |
K supply characteristics of rape seed field and K application rate for rapa seed in the ccnter of Zhejiang |
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| Abstract: | K supply in lowland soils developed from quaternary red earth and K application rate were studied by field experiments with rapeseed cropping. Upon the application of fertilizer K, the rapeseed yield increased by 7.5 - 90.8 kg mu -1 , averaged to 33.2 kg mu -1 . The relative yield (NP/NPK·100) ranged from 48.2 - 93.1% (74.0% on average). Close correlation was found between soil available K (extracted with 1 M NH 4OAC) and the relative yield of the rape seed (r = 0.645 ** , p< 0.01). The optimal concentration of the nutrient should be between 80 to 150 μg kg -1 . |
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| Keywords: | Lowland soil Rape seed K supply Soil testing Fertilizer recommendation |
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