不同钾肥品种在水稻防早衰上的应用

Application of Different Potassium Fertilizer Varieties in Preventing Early Senescence of Rice

以早稻品种“香两优68”为试验材料,探讨了不同钾肥品种对水稻后期光合功能衰退、叶片和根系衰老的调控效果。结果表明:钾肥均具有维持水稻功能叶片中较高的SOD活性、叶绿素含量和根系活力水平,从而延缓水稻功能叶和根系衰老的功能。硫酸钾镁肥具有比氯化钾、硫酸钾更好的延缓衰老的效果,并能明显提高水稻产量,分别比硫酸钾和氯化钾增产2.4%和2.8%。

The regulatory effects of different potassium tosynthetic function, leaves and roots at late stages of rice Xiangliangyou 68＂ as tested material. The results showed fertilizer varieties on senescence of phogrowth were studied by using early flee that all tested potassium fertilizer vafleties could maintain higher activity of SOD in leaves, higher chlorophyll content in leaves and stronger activity of root system, therefore they could delay senescence of leaf and root of flee. Applying sulfate potassium magnesium fertilizer had better effects than applying potassium sulfate and potassium chloride in delaying senescence, increasing flee yield by 2.4% and 2.8% respectively.