Yield and dry matter dynamics of vegetative and reproductive organs in Japanese anti US soybean cultivars

被引:0
作者
Kawasaki, Yohei [1 ,2 ]
Katsura, Keisuke [2 ,3 ]
Shiraiwa, Tatsuhiko [2 ]
机构
[1] Natl Agr & Food Res Org NARO, Western Reg Agr Res Ctr, Fukuyama, Hiroshima, Japan
[2] Kyoto Univ, Grad Sch Agr, Kyoto, Japan
[3] Tokyo Univ Agr & Technol, Grad Sch Agr, Fuchu, Tokyo, Japan
关键词
Dry matter production; harvest index; soybean; seed-filling stage; yield; SEED YIELD; REGISTRATION; ACCUMULATION; NITROGEN; PHOTOSYNTHESIS; PRODUCTIVITY; PERSPECTIVE; IMPROVEMENT; GENOTYPES; DURATION;
D O I
10.1080/1343943X.2018.1512874
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Recently, US soybean cultivars have exhibited higher yields than Japanese soybean cultivars. To identify the determinants for this yield difference in reference to dry matter dynamics, recently developed US cultivars and Japanese commercial cultivars were cultivated in drained paddy fields in 2012 and 2013. The total dry matter (TDM) of each cultivar was measured at the initial seedfilling stage (R5), at 30 d after R5, and at maturity (R8). From R5 to R8, the DM of abscised leaves and petioles were measured. The actual HI (with abscised leaves and petioles) and apparent HI (without abscised leaves and petioles) were determined at R8. US soybean cultivars showed higher yields and apparent TDM (without abscised leaves and petioles) than did Japanese cultivars at R8. However, the difference in actual TDM (with abscised leaves and petioles) production was not significant between US and Japanese cultivars at R8. On the other hand, the actual HI was higher in US cultivars than in Japanese cultivars. US cultivars exhibited a higher TDM distribution to the pod before R5 and a higher pod growth rate from R5 to 30 d after R5. US cultivars tended to show greater crop growth rates (CGRs) from R5 to 30 d after RS. The higher yield in US cultivars was associated with the higher actual HI, which was considered attributable to a greater TDM productivity during the seed-filling period and higher DM distribution in the pod before R5.
引用
收藏
页码:349 / 357
页数:9
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