| 播量与水肥耦合对秋闲田饲用谷子水分利用率的影响 |
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| 引用本文： | 周汉章,刘环,刘斐,王新玉,王新栋,魏志敏,南春梅,任晓利,侯升林.播量与水肥耦合对秋闲田饲用谷子水分利用率的影响[J].农学学报,2015,5(12):27-38. |
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| 作者姓名： | 周汉章 刘环 刘斐 王新玉 王新栋 魏志敏 南春梅 任晓利 侯升林 |
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| 作者单位： | 河北省农林科学院谷子研究所/国家谷子改良中心/河北省杂粮研究重点实验室,深泽县农业局,河北省农林科学院谷子研究所/国家谷子改良中心/河北省杂粮研究重点实验室,河北省农林科学院谷子研究所/国家谷子改良中心/河北省杂粮研究重点实验室,河北省农林科学院农业信息与经济研究所,河北省农林科学院谷子研究所/国家谷子改良中心/河北省杂粮研究重点实验室,河北省农林科学院谷子研究所/国家谷子改良中心/河北省杂粮研究重点实验室,河北省农林科学院谷子研究所/国家谷子改良中心/河北省杂粮研究重点实验室,河北省农林科学院谷子研究所/国家谷子改良中心/河北省杂粮研究重点实验室 |
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| 基金项目： | 农业部公益性行业科研专项“牧区饲草饲料资源开发利用技术研究与示范”(20120304201)。 |
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| 摘 要： | 为研究不同播量与水肥(N、P、K)耦合效应对秋闲田饲用谷子水分利用率的影响,以冀谷18为材料,采用五元二次回归正交旋转组合设计进行盆栽试验。结果表明,水分、磷肥等对水分利用率有重要影响,其中水分对水分利用率的影响最大,其次是磷肥,氮肥、钾肥、播量等没有明显影响；播量与水肥耦合的显著项及其强弱顺序为：钾肥+播量>氮肥+磷肥>水分+磷肥>水分+播量>水分+钾肥,其它各项没明显影响。构建了数学模型Y=44.26-1.311x1-2.298x2-3.682x3-6.401x4-34.540x5+0.273x1x3+0.118x1x4+0.843x1x5-1.948x2x3+6.631x4x5,明确了以经济效益为考核指标的最优方案：土壤含水量保持10%、饲用谷子播量15 kg/hm2。该方案水分利用率为26.24 g/kg,干草产量折合13980.90 kg/hm2,经济效益为13830.90元/hm2,较产草量最高的优化组合增收3063.73元/hm2,增幅22.15%,较水分利用率最高的优化组合增收6215.15元/hm2,增幅44.94%,为秋闲田饲用谷子生产实践提了供理论依据和技术支撑。
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| 关 键 词： | 海南岛冷冬 海南岛冷冬 大气环流 回归方程 冷冬预测 |
| 收稿时间： | 2015/4/21 0:00:00 |
| 修稿时间： | 2015/5/14 0:00:00 |
Effects of Different Seeding Rates, Water and Fertilizer Coupling on Water Use Efficiency of Fodder Millet (Setaria itlica (L) Beauv) in Autumn Idle Land |
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| Abstract: | The aim of this study was to study the influence of the different seedling density, water and fertilizer(N,P,K) coupling effects on water use efficiency of fodder millet (Setaria itlica(L)Beauv) in autumn idle land. Five factors quadratic regression orthogonal rotation combination was designed in pot experiment with Jigu No.18. The results showed that moisture content and P2O5 had important effects on water use efficiency .The biggest influence on water use efficiency is moisture content , followed by P2O5.The significantly different coupling strength orders are: K and Seedling density> N and P > Moisture content and P > Moisture content and Seedling density > Moisture content and K. Moreover. Have built mathematical model:Y=44.26-1.311x1-2.298x2-3.682x3-6.401x4-34.540x5 0.273x1x3 0.118x1x4 0.843x1x5-1.948x2x3 6.631x4x5, the optimum proposal with economic benefit as evaluation indexes was determined as follows: Soil moisture conservation 10% and forage millet seedling density 15 kg/hm2. In the proposal, water use efficiency were 26.24 g/kg and hay grass yields were 13980.90 kg/hm2, economic benefit is 13830.90 yuan/hm2, which increased by 3063.73 yuan/hm2, the increased range was 22.15% when comparing with the optimal combination of the highest yield and increased by 6215.15 yuan/hm2, the increased range was 44.94% when comparing with the optimal combination of the highest water use efficiency. The results provided a theoretical basis and technical support to the fodder millet production in autumn idle land. |
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| Keywords: | Autumn idle land Forage millet Seedling density Water and fertilizer coupling Water use efficiency |
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