The effects of different direct seeding methods on the yield of Xiadao1

doi:10.14088/j.cnki.issn0439-8114.2022.24.003

Abstract

Abstract: Adopted Xiadao1 rice variety, three sowing methods, namely mechanical precision hole seeding, unmanned aerial vehicle （UAV） broadcast sowing and UAV drill sowing, were used to comprehensively investigate the effects of rice leaf area index, leaf SPAD, photosynthetic rate, aboveground dry matter accumulation and transport, and yield. The results showed that the yield of mechanical precision hole seeding, UAV broadcast sowing and UAV drill sowing were 8.05, 9.52 and 8.52 t/hm², respectively, and the UAV broadcast sowing treatment had the best yield increase effect. The main reasons for the increased yield in UAV broadcast sowing treatment were the post-flowering rice population had a higher leaf area index, and the leaf SPAD maintained a higher level at the later growth stage, which stabilized the photosynthetic dry matter accumulation in the aboveground part, improved the dry matter and grain distribution operation, and ensured the increase of effective ear and 1 000-grain weight. Therefore, using UAV broadcast sowing combined with reasonable water and fertilizer management technology to improve the leaf area index and stabilize the effective ear number could enhance the stable yield of direct seeded rice.

Key words: rice, UAV direct-seeding, mechanical direct-seeding, dry matter accumulation, yield

CLC Number:

S511

YANG Xiao-long, WANG Ben-fu, LI Yang, ZHANG Zhi-sheng, ZHANG Zuo-lin, PAN Gao-feng, WANG Biao, YANG Lan-tian, CHENG Jian-ping. The effects of different direct seeding methods on the yield of Xiadao1[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(24): 15-18.

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