| Effect of different diammonium phosphate levels and population type on root traits of super-high-yield soybean cultivars |
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| DOI：10.7606/j.issn.1000-7601.2014.02.019 |
| Key Words: soybean fertilizer amount root morphological root activity bleeding sap |
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| Abstract: |
| Super-high-yielding soybean cultivar Liaodou 14, Zhonghuang 35, and conventional cultivar Liaodou11 were used to study the root competitiveness of Super-high-yield soybean under different fertilizer rate (0,100 and 200 mg diammonium phosphate/kg soil) and population type (single seeding and mix seeding). The result showed that the root morphological trait, root vigor and bleeding sap amount of soybean showed a significant difference for cultivar and cultivar×fertility interaction. The root length, root surface, and bleeding sap of conventional cultivar Liaodou11 were higher than those of super-high-yield cultivar under the non-fertilizer treatment especially at blooming stage and single seeding treatment (46.3%,47.6% and 27.9%). On the other hand, the root morphological index, root activity, bleeding and bleeding element content of super-high-yielding soybean cultivar was significant higher than that of the conventional cultivar, which was more obviously at seed filling stage and mix seeding treatment. The results indicated that super-high-yield soybean root had higher growth rate and absorbing ability at abundant fertilizer rate. |
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