| Cite this article: | 杨丞,陈艺周,马世浩,等.土壤含水量对水稻耗水特性及生长发育的影响[J].灌溉排水学报,0,():-. |
| YangCheng,ChenYiZhou,MaShiHao,et al.土壤含水量对水稻耗水特性及生长发育的影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Effects of Soil Water Content on Water Consumption Characteristics and Growth of Rice |
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YangCheng1, ChenYiZhou1, MaShiHao1, WangGuiBing1, ZhangGeng2, LiXiaoKun1
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1.College of Resources and Environment, Huazhong Agricultural University;2.National Agricultural Technology Extension Service Center
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| Abstract: |
| 【Objective】Ascertain the suitable soil water content for the efficient use of water and the growth of rice.【Method】A pot experiment with four soil water content of more than 90% (W1, control), 75%~90% (W2), 60%~75% (W3) and 45-60% (W4) were used to explore the effects of soil water content on rice water consumption, water consumption intensity, biomass, yield, water use efficiency, and leaf physiological status.【Result】Compared with W1, the water consumption of W2, W3 and W4 during the whole growth period decreased by 32.4%, 58.7% and 69.9%, respectively; the water consumption intensity during the whole growth period decreased by 32.4%, 61.5% and 73.5%, respectively; the biomass decreased by 12.4%, 63.9% and 82.7%, respectively; the grain yield decreased by 13.2%, 71.7% and 92.0%, respectively; the water use efficiency of W2 increased by 24.5%, while the water use efficiency of W3 and W4 decreased by 36.0% and 74.7%, respectively; plant height decreased by 4.1%, 16.9% and 21.6%, respectively; root bleeding speed decreased by 32.7%, 92.5%, and 92.8%, respectively; leaf area decreased by 19.4%, 45.0% and 75.6%, respectively; relative water concentration decreased by 1.1%, 8.2% and 13.7%, respectively; specific leaf weight increased by 5.4%, 34.3% and 59.4%, respectively; SPAD value increased by 9.1%, 18.8% and 17.2%, respectively; soluble sugar concentration increased by 8.0%, 16.4% and 22.5%, respectively; the proline content increased by 39.9%, 202.0% and 392.6%, respectively; the air-leaf temperature gap of W2 increased by 4.5%, while the air-leaf temperature gap of W3 and W4 decreased by 53.3% and 77.1%, respectively.【Conclusion】Considering comprehensively from the perspectives of efficient water use and ensuring the normal growth of rice, soil water content of 75%~90% can improve water use efficiency and reduce water consumption under the premise of ensuring higher rice yields, which has a good prospect for promotion and application. |
| Key words: soil water content; water deficit; rice; water consumption characteristics; water use efficiency |
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