水肥气热耦合对温室番茄生长机理及产量的影响研究

发布时间：2018-01-17 14:08

  本文关键词：水肥气热耦合对温室番茄生长机理及产量的影响研究　出处：《宁夏大学》2017年硕士论文　论文类型：学位论文

  更多相关文章： 非耕地温室 番茄 滴灌 水肥气热耦合 节水灌溉

【摘要】：本文针对宁夏贺兰县非耕地温室蔬菜灌溉水利用率低、肥料利用率低等实际问题,立足贺兰县欣荣村温室蔬菜试验示范基地,采用正交试验、二次通用旋转组合试验方法,对非耕地温室番茄水肥气热耦合效应进行了系统的研究,为宁夏温室番茄水肥气热耦合灌溉推广提供了理论依据。主要研究结果如下:1.采用正交试验方法,对灌水定额、施肥量、溶氧量和地热管水温四因素三水平9个处理的水肥气热最优组合方案进行了试验研究。通过极差分析和方差分析,得出影响产量的主次因素为地热管水温(主)——溶氧量——灌水定额——施肥量;各单因素与产量的变化趋势,即灌水定额和施肥量与产量均呈凸抛物线增长趋势,而溶氧量和地热管水温与产量的变化趋势基本呈线性增长;影响产量的最优水平组合为A2B2C1D3,即灌水定额10 m3/667m2、施肥量12 kg/667m2、溶氧量6 mg/1和地热管水温35℃。同时也分别得出了影响生长量、光合作用、品质等指标的主次因素,各单因素与产量的变化趋势及四因素的最优水平组合。2.采用二次通用旋转组合设计试验方法,对灌水定额、施肥量、溶氧量和地热管水温四因素五水平的水肥气热耦合模型进行了试验研究。建立了产量与水肥气热耦合的回归模型,并通过F检验和t检验,说明回归方程显著,可用于预测产量;通过模型解析,得出影响产量的主次因素为灌水定额(主)——施肥量——地热管水温——溶氧量;各单因素与产量的变化趋势,即随着灌水定额、施肥量、溶氧量和地热管水温的增大产量在持续增长。并得出在一定产量条件下的的水肥气热最优组合方案,同时也分别建立了生长量、光合作用、品质等指标与四因素的回归模型;通过模型解析,得出在一定产量条件下的的水肥气热最优组合方案。
[Abstract]:Aiming at the practical problems such as low utilization rate of irrigation water and low utilization rate of fertilizer in non-cultivated greenhouse vegetables in Helan County, this paper bases on the greenhouse vegetable experiment demonstration base of Xinrong Village, Helan County, and adopts orthogonal experiment. The effects of water, fertilizer, gas and heat coupling on non-cultivated greenhouse tomato were studied in this paper. The main results are as follows: 1. Using the orthogonal test method, the irrigation quota and the amount of fertilizer were applied. The optimal combination of water, fertilizer and gas heat was studied by means of range analysis and variance analysis. The main and secondary factors influencing the yield are the water temperature of geothermal pipe (main oxygen dissolved quantity-irrigation quota-fertilizer quantity); The variation trend of each single factor and yield, that is, irrigation quota, fertilization amount and yield, all showed a convex parabola trend, while the variation trend of dissolved oxygen quantity and geothermal pipe water temperature and yield showed a linear increase. The optimal level combination affecting yield was A2B2C1D3, that is, irrigation quota of 10m3 / 667m2and fertilization amount of 12 kg/667m2. The dissolved oxygen content (6 mg/1) and the water temperature of the geothermal pipe were 35 鈩，

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