| Cite this article: | 张光岩,李俊良,刘刚,等.不同灌溉模式对小麦干物质积累及产量经济效益的影响[J].灌溉排水学报,2020,(7):-. |
| zhangguangyan,lijunliang,liugang,et al.不同灌溉模式对小麦干物质积累及产量经济效益的影响[J].灌溉排水学报,2020,(7):-. |
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| Effects of different irrigation modes on dry matter accumulation and yield economic benefit of wheat |
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zhangguangyan1, lijunliang1, liugang2, xuliangju1, jinshengai1
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1.Qingdao Agricultural University;2.Stanley agriculture group co. LTD
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| Abstract: |
| Huang-huaihai region is one of the main wheat producing areas in China. About 36.0~48.4% wheat planting area in China in this area. The survey shows that the shortage of resources and the deterioration of ecological environment in the process of grain production are increasingly prominent. Traditional fertilization and irrigation methods are still widely used, which further aggravate the problems of deep leakage of soil nutrients, groundwater pollution, soil quality decline and low utilization efficiency of fertilizers. The development of water-saving irrigation technology is one of the important means to alleviate the shortage of water resources in this region. However, the water-saving irrigation area in Huang-huai-hai area occupies a small share, with 0.8% for micro-irrigation and 11.5% for drip irrigation. Previous researches on winter wheat irrigation model mostly focused on the comparison between single drip irrigation or micro-irrigation and traditional flood irrigation, and few of them put the five irrigation models of small micro irrigation, large micro irrigation, elevated micro irrigation, drip irrigation and flood irrigation (commonly used by farmers, also known as small white dragon irrigation) together for comparative analysis. So we want to put this five different irrigation modes together in this experiment. And comprehensively compare their effects on wheat production. The differences of wheat SPAD, dry matter accumulation, nutrient uptake and yield under different irrigation modes were analyzed. 【Objective】The aim is to select the optimal irrigation model and provide theoretical guidance and data support for the realization of high efficiency of grain production at the same time. 【Method】In this experiment, the strong gluten wheat Yannong no. 21 was taken as the research object, and we set five irrigation modes, including diffuse irrigation, small micro-spray irrigation, large micro-spray irrigation, elevated micro-spray irrigation and drip irrigation. The effects of different irrigation modes on dry matter accumulation, transport, absorption and utilization, yield and economic benefit of wheat were studied. 【Result】Different irrigation modes had significant effects on the accumulation and transfer of dry matter in wheat, and the accumulation of dry matter before flowering in wheat under drip irrigation mode was 38.0%~59.2% higher than that under other irrigation modes. The contribution rate of transferred dry matter to grains in drip irrigation model was 104.8%, 421.0%, 129.0% and 126.8% higher than that in the model of diffuse irrigation, the model of small micro-spraying, the model of large micro-spraying and the model of overhead micro-spraying. In terms of nitrogen and phosphorus，all of the accumulation, transfer and the contribution rates of nitrogen(phosphorus) accumulation in wheat under drip irrigation were significantly higher than those in other irrigation models. The yield and economic benefit of wheat under drip irrigation were significantly higher than other irrigation models.In addition, the economic benefits of small micro-spraying, large micro-spraying, elevated micro-spraying and drip irrigation were 25.0%, 23.4%, 25.4% and 77.0% higher than that of the flood irrigation.【Conclusion】Therefore, under the condition of the same irrigation amount, it is recommended to choose drip irrigation mode, followed by elevated micro-spraying mode, which can promote the absorption and utilization of wheat nutrients, improve wheat yield and economic benefits, and is suitable for wheat planting in dry areas. |
| Key words: irrigation mode; dry matter accumulation; nutrient absorption; yield; economic benefit |
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