ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (5): 106-115. doi: 10.7668/hbnxb.201751562

Special Issue: Rice Drought and water saving

• Tillage and Cultivation·Physiology and Biochemistry • Previous Articles     Next Articles

Effects of Irrigation Methods on Physiological Characteristics, Dry Matter Accumulation and Yield of Rice in Double Cropping Rice Field

XU Yilan, LIU Tangxing, FU Aibin   

  1. Hunan Biological and Electromechanical Polytechnic, Changsha 410127, China
  • Received:2019-03-18 Published:2019-10-28

Abstract: Irrigation is an important management measure that affects the growth and development, grain yield of rice. In order to explore the effects of different irrigation methods on the physicochemical and biological characteristics, and grain yield of rice in double-cropping rice system, the changes physiological and biochemical characteristics, dry matter accumulation and distribution, grain yield of early rice and late rice were analyzed under 3 treatments of intermittent irrigation method(Ⅱ), wet irrigation method(WI)and water saving irrigation method(WSI). The results showed that, at main growth stages of early rice and late rice, the tillering number of rice in different irrigation methods was Ⅱ > WI > WSI and the leaf area index was WI > Ⅱ > WSI. The activities of SOD, POD and CAT of rice leaves increased in treatments Ⅱ and WI compared with that in treatment WSI. The Pn of rice leaves in different irrigation methods decreased following the order of WI > Ⅱ > WSI at main growth stages. The dry weights of root, stem and panicle were Ⅱ > WI > WSI, but the dry weight of rice leaves was WI > Ⅱ > WSI. There was no significant difference in panicle dry weight among different treatments. The results indicated that the number of effective tillers was higher in Ⅱ treatment than in WI and WSI, but there were no significant differences in spikelet number per panicle, seed setting rate and 1 000 grains weight of rice among different treatments. The grain yield of rice was higher in Ⅱ treatment than in WI and WSI. Compared with WI and WSI treatments, the grain yield of early rice in Ⅱ treatment increased by 107.9,461.7 kg/ha in 2016, and 98.8,422.2 kg/ha in 2017, respectively, while the grain yield of late rice in Ⅱ increased by 250.1,683.6 kg/ha in 2016, and 220.3,661.8 kg/ha in 2017, respectively. The intermittent irrigation method(Ⅱ)enhanced the protective enzyme activities and photosynthetic characteristics of rice leaves, increased the dry matter accumulation of rice plant and improved the yield components, thus increased the grain yield of rice.

Key words: Rice, Irrigation methods, Physiological characteristics, Dry matter, Yield

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Cite this article

XU Yilan, LIU Tangxing, FU Aibin. Effects of Irrigation Methods on Physiological Characteristics, Dry Matter Accumulation and Yield of Rice in Double Cropping Rice Field[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(5): 106-115. doi: 10.7668/hbnxb.201751562.

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