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| DOI：10.13522/j.cnki.ggps.20190110 |
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| Effects of Different Irrigation Volume and Direct Seeding Number on Growth and Yield of Rice under Drip Irrigation |
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MA Xiaopeng， MO Yan， LYU Yuping， WANG Zeyu， XIE Xiangwen
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1.Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830000, China;2.Key Laboratory of Agricultural Environment in Northwest Oasis, Ministry of Agriculture, Urumqi 830000, China；3. Institute of Water Conservancy, Chinese Academy of Water Resources and Hydropower Sciences, Beijing 100000, China; 4. Institute of Food Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830000, China
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| Abstract: |
| 【Objective】 This paper aims to explore the optimal irrigation quota and seeding rate for high yield and high efficiency of drip irrigation rice. 【Method】 The experiment was carried out at the national monitoring base of fertility and fertilizer effect of grey desert soil of Xinjiang Academy of Agricultural Sciences. Three irrigation quotas were set at 796 mm (W1), 938 mm (W2), 1 059 mm (W3), and the number of direct seeding grains was 8 grains (D1), 14 grains (D2) and 20 grains (D3) per hole. The water use efficiency, yield and dry matter were measured by sampling at different growth stages. The effects of different irrigation amount and direct seeding grain number on the growth and yield of drip irrigation rice were analyzed. 【Result】 The highest dry matter accumulation was 2 962.67 g/m2 in combination W3D1, and the interaction between irrigation and direct seeding grain number was very significant; the highest plant height was 83.46 cm in combination W3D1, and the highest leaf area index was in combination W3D1 in interaction with direct seeding grain number, reaching extremely significant water level. The yield of W3 treatment increased by 54.95% and 30.24% compared with those of W1 and W2 treatment when the number of direct seeding grains was 8. In W3 water treatment, the yield of D1 treatment increased by 19.11% and 23.96% respectively compared with those of D2 and D3 treatment. From the interaction between irrigation amount and direct seeding grain number, the yield of each irrigation amount and direct seeding grain number increased by 19.11% and 23.96%, respectively. The highest yield of W3D1 treatment was 6 789.00 kg/km2, and the best combination of W3D1 treatment was 0.65 kg/m3. 【Conclusion】 By observing the water use efficiency, yield, dry matter accumulation, root-shoot ratio, plant height, leaf area index and other indicators at different growth stages, it is indicated that W3D1 combination is the best irrigation water quantity and direct seeding grain number under the experimental conditions. |
| Key words: drip irrigation rice; irrigation amount; growth and development; yield; direct seeding number |
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