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《China Rice》 2017-04
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Effects of Different Water Management on Seedling Growth of Rice in Straw Substrates

LIAO Sha;TAN Xueming;LI Muying;HU Kai;PAN Xiaohua;SHI Qinghua;Collaborative Innovation Center for the Modernization Production of Double Cropping Rice, Jiangxi Agricultural University/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology,Ecology and Genetic Breeding;Agricultural Technology Extension Service Station of Tongnan Town in Nanchang County;  
In order to clarify the water management mode of substitute soil cultivation strong seedling of mechanically transplanted rice, the effects of three kinds of water management(per 1 d, 3 d, 5 d irrigation to the saturated state matrix)on the growth of rice seedlings were discussed in this study, using Zhongjiazao 17 as material. The results showed that different water managements have obvious effects on the quality of rice seedling. The appropriate water deficit would inhibit the height of seedling, promote the growth of root, improve the activity of root and the seedling rate. The seedlings during the 2~3 leaf stage were sensitive to water deficit. Water deficit made seedlings leaf emergence slow, leaf length and leaf sheath length shorten, light leaf color lighten, exert an inhibitory effect on seedlings growth. However, suitable water deficit would enhance the carbon and nitrogen metabolism, increase the dry weight of seedlings, and improve the strong seedlings index of rice. It was the best for straw substrates cultivation rice seedling in 3 days(W2)irrigation, which was beneficial to improve the comprehensive quality of seedling, and was suitable water management mode for me-chanical transplanted rice seedling.
【Fund】: 江西省科技支撑计划项目(20141BBF6007);; 江西省水稻产业技术体系专项(JXARS-02-03)
【CateGory Index】: S511.31
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