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用营养液培养法研究了不同盐度对甜菜生长和养分吸收的影响。结果表明,与无 NaCl处理相比,NaCl 40mmol/L增加甜菜干物质重量,NaCl 80- 180mmol/L对甜菜干物质重量无影响,NaCl 280- 380mmol/L则降低甜菜干物质重量。NaCl40mmol/L增大甜菜叶面积,降低叶片叶绿素含量,促进甜菜对NO3-吸收,不影响对镁的吸收,但是已明显抑制钾和钙的吸收,降低组织钾、钙、镁含量;随着NaCl浓度提高(80-380mmol/L),甜菜单株叶面积逐渐减少,叶片叶绿素含量逐渐得以回升或提高,氦、钾、钙和镁吸收量和含量逐渐降低。NaCl40-380mmol/L均不同程度刺激甜莱对磷的吸收,并提高组织磷含量,不影响氮、磷、钙和镁向地上组织运输能力,但抑制钾向地上组织运输。
The effects of different salinity on the growth and nutrient absorption of sugar beet were studied by nutrient solution culture. The results showed that 40 mmol / L NaCl increased the weight of sugar beet dry matter, NaCl 80-180 mmol / L had no effect on the weight of dry sugar beet, while 280-380 mmol / L NaCl decreased the dry weight of sugar beet. NaCl40mmol / L increased the leaf area of sugarbeet, decreased the content of chlorophyll in leaf, promoted the NO3- absorption of sugar beet and did not affect the absorption of magnesium, but inhibited the absorption of potassium and calcium and decreased the contents of potassium, calcium and magnesium; (80-380mmol / L), leaf area of beet plants decreased gradually, leaf chlorophyll content gradually increased or increased, and the contents of helium, potassium, calcium and magnesium decreased gradually. NaCl40-380mmol / L stimulated the absorption of phosphorus to some extent and did not affect the transportation ability of nitrogen, phosphorus, calcium and magnesium to aboveground tissues, but inhibited the transportation of potassium to aboveground tissues.