Effects of water management on the yield and the emission of greenhouse gas in direct-seeding rice following wheat

doi:10.14088/j.cnki.issn0439-8114.2019.24.007

Abstract

Abstract: A japonica rice cultivar of C-liangyouhuazhan was directly sown in the field. The former crop was wheat and the straw all was returned field. The treatments of dry-direct-seeding, water-direct-seeding, intermittent irrigation, flood irrigation were conducted. The indexes of rice yield, leaf SPAD value, CH₄ and N₂O were measured. The law of water management on the formation of direct seeding yield and greenhouse gas emission in direct-seeding rice following wheat was studied. The results showed that the yield of water-direct-seeding was higher than dry-direct-seeding and the yield, SPAD value, plant high, root activity of intermittent irrigation were higher than flood irrigation. Intermittent irrigation treatment has great influence on N₂O emission, while flooded irrigation treatment has great influence on CH₄ emission. The water use efficiency（WUE） can be improved through dry-direct-seeding and intermittent irrigation.

Key words: direct seeding, rice following wheat, yield, greenhouse gas

CLC Number:

S511

LI Yang, WANG Ben-fu, ZAHGN Zhi-sheng, XIAO Fei, WANG Ling-fei, MA Jie, CHENG Jian-ping. Effects of water management on the yield and the emission of greenhouse gas in direct-seeding rice following wheat[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(24): 27-30.

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