| Study on the relationship between root growth of spring soybean and flower pod formation |
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| DOI：10.7606/j.issn.1000-7601.2016.05.14 |
| Key Words: spring soybean super high yield root flower pod |
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| Abstract: |
| To prove the growth of super high yield soybean, a field study to investigate the relationship between root and the formation of flower and pod was implemented during 2013—2014. The main purpose of the study was to explore the relationship among root bleaching quantities, and differences of root dry weight in the 0～80 cm soil and flowering-pod numbers. The results showed that nearly 80% of the root weight was formed during the flowering and pod-bearing stages. For super high-yielding variety (lines), its root bleaching quantity at the flowering-pod stage, total root dry weight in the 0～80 cm soil layer , root activity in 0～40 cm, total flowers, and total cavity number were all significantly higher than those of the high yield variety (lines). The correlation coefficients between root dry weight increment, and bleeding potential and total flowers at the flowering stage were 0.970, and 0.898(P<0.05), respectively. The correlation coefficients between root dry weight increment, and bleeding potential and total flowers at the flowering-pod phase were 0.905, and 0.77 (P<0.05), respectively. The total flower-pod number of the super high-yielding variety (lines) was significantly higher than that of the high yield variety (lines) because of the large root volume and the high activity of the former. Yield of spring soybean with medium maturity was nearly 6 000 kg·hm-2 at the R5 stage. Total root dry weight was 125～142.3 g·m-2 in 0～80 cm soil. The total number of flowers were 3 448.4～3 695.7×104·hm-2, and the total number of cavities were 2 767.4～3 303.8×104·hm-2. |
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