| 王素华，段 慧，万国安，杨 丹，李树举，李 璐，路 瑶，罗彬彬.常德稻区马铃薯肥料效应模型研究[J].广东农业科学,2018,45(11):68-73 |
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常德稻区马铃薯肥料效应模型研究 |
| Analysis of N-P-K fertilizer response mode on potato among rice cultivation area in Changde |
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| DOI：10.16768/j.issn.1004-874X.2018.11.011 |
| 中文关键词: 旱粮作物 马铃薯 肥料效应 冬闲稻田 |
| 英文关键词: upland crops potato fertilizer effect winter fallow rice field |
| 基金项目:国家马铃薯产业技术体系项目（CARS-10） |
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| 摘要点击次数: 1649 |
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| 中文摘要: |
| 为构建马铃薯肥料效应模型，在常德稻区开展马铃薯“3414”肥料效应试验。结果表明：缺钾使马铃薯产量下降，缺氮缺磷使单株块茎重、商品率、产量显著下降；在当前地力水平下，肥料对产量的贡献率接近70%，氮、磷、钾肥肥效均随施肥水平的增加呈先升后降的趋势，并在施肥水平2时最高，氮肥肥效＞磷肥＞钾肥；块茎养分总利用率为22.16%，块茎中的氮、磷、钾含量均随施肥水平的增加呈先升后降趋势，并在施肥水平2时最高，块茎氮肥利用率＞钾肥＞磷肥；以“3414”试验结果为基础建立三元二次及一元二次肥效模型，根据复测试系数和产投比最后确定氮、磷、钾推荐每667 m2施肥量分别为15.1、7.6、2.2 kg，最佳施肥配比为1∶0.50∶0.15。 |
| 英文摘要: |
| To establish potato fertilizer effect model,“3414”field experiments on potato were conducted in winter fallow rice field of Changde. The results showed that total yield was declined under potassium deficiency; tuber yield, commodity potato rate and total yield were significantly declined under nitrogen and phosphorus deficiency. The fertilizer contribution rate was close to 70% at the present land capability. Nitrogen, phosphorus and potassium had the best yield response in the fertilization level 2 and showed hump-backed pattern as fertilizer amount increasing. The positive effects of fertilizer followed as N ＞ P ＞ K. The tuber total nutrients availability was 22.6%. Nitrogen, phosphorus and potassium content of tuber also had the best yield response in the fertilization level 2 and showed hump-backed pattern as fertilizer amount increasing. The positive effects of tuber nutrients availability followed as N ＞ P ＞ K. Data were analyzed based on the“3414”xperiments to establish the ternary quadratic and one-place quadratic fertilizer models. The recommendation of N, P and K was 15.1, 7.6 and 2.2 kg/667 m2 respectively based on R2 and value to cost ratio (VCR). The optimal ratio of N, P, K was 1:0.50:0.15. |
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