Journal of Northern Agriculture ›› 2020, Vol. 48 ›› Issue (4): 10-17.doi: 10.12190/j.issn.2096-1197.2020.04.02

• Corp cultivation·Physiology and biochemistry • Previous Articles     Next Articles

Effect of sowing date on the stem lodging resistance in direct seeding rice

XU Bo, WANG Baoxiang, YANG Bo, CHEN Tingmu, XING Yungao, SUN Zhiguang, LIU Yan, LU Baiguan, XU Dayong   

  1. Lianyungang Academy of Agricultural Sciences,Lianyungang 222002,China
  • Received:2020-06-17 Online:2020-08-20 Published:2020-10-23

Abstract: 【Objective】 To determine the performance of stem related characters in direct seeding rice and their relationship with lodging resistance under different sowing dates,to provide reference for lodging resistance breeding in direct seeding rice.【Methods】 Lianjing7, Xudao3(Medium-maturing medium Japonica Rice)and Lianjing15,Lianjing13ZJ61(Early-maturing medium Japonica Rice)were used as experimental materials,three sowing dates were set on June 10,June 20 and June 30.The effects of sowing date on the growth dynamics of the above ground and yield in direct seeding rice were studied,and the correlation between the stem characters and the lodging resistance in rice plants were analyzed.【Results】 The yield components and actual yield of four varieties all decreased with the delay of sowing date,but the degree of decline was different.With the delay of sowing date,the bending resistance of stem and the bending moment decreased,the spike length and the plant height significantly decreased,the dry weight per unit internode of basal internode and the anti-overturning force per plant also decreased.The lodging resistance of different varieties was closely related to internode length,stem dry weight and dry weight per unit internode.【Conclusion】 Early sowing(June 10),shorter for the first and second internodes,its stem with high dry weight and plumpness,was conducive to lodging resistance for direct seeding rice.

Key words: Direct seeding rice, Sowing date, Lodging resistance, Stem traits

CLC Number: 

  • S511