| Cite this article: | 孙雪梅.不同节水灌溉方式及栽培模式下粳稻生长特性研究[J].灌溉排水学报,0,():-. |
| Sun Xuemei.不同节水灌溉方式及栽培模式下粳稻生长特性研究[J].灌溉排水学报,0,():-. |
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| Study on growth characteristics of japonica rice under different water-saving irrigation methods and cultivation patterns |
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Sun Xuemei
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Heilongjiang Province Hydraulic Reaearch Institute
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| Abstract: |
| 【Objective】In order to alleviate the contradiction between supply and demand of agricultural water resources, ensure the sustainable development of japonica rice cultivation, the growth characteristics and water consumption law under different irrigation cultivation patterns were studied, aiming to provide technical support for water-saving cultivation of japonica rice.【Method】The growth characteristics, water consumption, yield and its component factors of japonica rice under different water-saving irrigation and cultivation patterns were studied by weighing lysimeter, comparative analysis, variance analysis and correlation analysis were used to process the experimental data.【Result】The results of different water-saving irrigation methods under the same cultivation pattern showed that KZ treatment was the best in effective tiller, water consumption and yield, and water productivity was equivalent to SR treatment, which was the optimal water-saving and high-yield irrigation scheduling; the water consumption of QS treatment were 19.90% higher , yield were 4.22% lower and water productivity were 20.11% lower than that of KZ, more ineffective tillers were produced in SR treatment, and plant height was higher than that of KZ; SR treatment had strict water control and insufficient effective tillers, low water consumption and high water productivity, but the yield of japonica rice was much lower than KZ and QS treatment.The results of different cultivation patterns under the same water-saving irrigation method that the direct seeding planting mode lagged behind in the growing stage, but it showed a compensatory effect on tiller and water consumption in the middle and late tillering stage, the tiller number of SZB treatment was basically the same as KZ treatment, while the compensatory effect of HZB treatment was insufficient. Under the same water-saving irrigation method, the yield of direct seeding was lower than that of transplanting, and HZB treatment was particularly obvious. Compared with different water-saving irrigation methods under the transplanting condition, the yield of SZB treatment was better than SR treatment, and the water productivity was better than QS treatment. Under the same water-saving irrigation method, there was little difference in water consumption between direct seeding and transplanting during the growth period, but direct seeding have no seedling cultivation stage, HZB does not require steeping field, which can save water and labor. By comprehensive comparison, SZB has a better promotion prospect than HZB.【Conclusion】Through comprehensive analysis, in terms of irrigation system, controlled irrigation was the best water-saving irrigation system for japonica rice, followed by shallow wet irrigation；in terms of cultivation mode, transplanting is still the best cultivation mode for high and stable yield, and water direct seeding has obvious advantages in saving labor, which has the prospect of popularization. |
| Key words: japonica rice, water saving irrigation, cultivation pattern, transplanting, direct seeding |
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