不同施磷水平对橡胶幼苗营养根碳氮代谢的影响

Carbon and Nitrogen Metaboly of Rubber Seedling Roots at Different Phosphorous Fertilizer Levels

以热研7-33-97橡胶嫁接苗为材料,通过盆栽试验测定了营养根可溶性糖和可溶性蛋白含量,研究了不同施磷浓度对橡胶幼苗根系碳氮代谢的影响。结果表明:在缺磷和少磷(0、500mgkg-1)条件下,橡胶幼苗营养根SSC、SPC含量高,根系生长快,反映敏感;大于500mgkg-1磷浓度处理,根系SSC、SPC变化不大。在不同的物候期中,成熟期、抽生期和古铜期,根系生长稳定,C/N低;淡绿期和稳定期根系生长受抑制,C/N高。

Taking SCATC 7-33-97 as the experiment material,the carbon and and nitrogen metaboly of rubber seedling roots at different phosphorous fertilizer levels by determining the soluble sugar content （SSC） and soluble protein content （SPC） of nutrition roots in potted trial was studied. The results showed that when the SSC and SPC were higher, roots grew fast and sensitivity of rubber seedling nutrition roots on the lack and little phosphorus condition. SSC and SPC of roots were little changes on the phosphorus content more than 500 mg kg^-1 condition. For different Phenophase, C/N ratio and roots growth were stable in mature stages, sprout stage and bronze-coloured stage. C/N ratios were higher, roots growth restraining in light green and stable stage.