硒对不同氮源多花黑麦草幼苗生长的影响

Effects of selenium on the seedling growth of Italian ryegrass under different N sources

试验研究Se对不同N源多花黑麦草幼苗生长的影响结果表明,低浓度Se对多花黑麦草幼苗生长发育并无显著促进效应,但可显著提高其根可溶性蛋白质含量和幼苗可溶性糖含量,尤以Se浓度≤0.10mg/L处理显著提高其根干物质量和幼苗可溶性蛋白质含量,而Se浓度1.0mg/L处理则显著抑制幼苗生长,使幼苗失绿。酰胺态氮显著促进幼苗增重且叶色深绿;同一N源经Se、Si及二者配施处理均未显著提高幼苗干物质量及叶绿素含量。

The effects of Se on the seedling growth of Italian ryegrass under different N sources are studied. The results show that the low concentration of Se has no significant positive effect on the growth of Italian ryegrass seedlings, but can increase the soluble protein content in root and soluble sugar content in shoot significantly. Se conc.≤0.10mg/L treatment can increase the dry matter weight of root and soluble protein content in shoot. Se 1.0mg/L treatment can decrease the seedling growth significantly and make it chlorosis. Urea-N increases the dry weight of Italian ryegrass seedling with dark green color. The mixed application of Se, Si and Se and Si has no positive effect on the increase of seedling weight and chlorophyll content in leaves under the same N source.