磷酸二铵施肥量和单混种植对超高产大豆根系性状的影响研究

Effect of different diammonium phosphate levels and population type on root traits of super-high-yield soybean cultivars

在盆栽条件下,以超高产大豆品种辽豆14、中黄35和普通大豆品种辽豆11为试材,探讨了超高产品种在不同施肥量和种植类型处理下根系的竞争力。结果表明,超高产品种和普通品种大豆的根系形态性状、根系活力和伤流成份在品种和品种×肥力互作间均存在显著差异。开花期,普通品种在不施肥条件下单播处理的根长、根表面积和伤流量较超高产品种分别高出46.3%、47.6%和27.9%,差异达显著水平。超高产品种在中肥和高肥水平下根系形态指标较高,在鼓粒期和混播处理中其根系活力、伤流量和伤流成份含量均显著高于普通品种。说明在施肥量充足时,超高产品种的根系较普通品种表现了良好的生长优势和吸收能力。

Super-high-yielding soybean cultivar Liaodou14 ,Zhonghuang35 ,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 ＆#215; 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 culti-var ,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 .