不同养分模式对水稻叶片衰老的影响研究

Effects of different nutrient treatments on the senescence of rice leaves.

试验研究不同养分模式对水稻生育后期剑叶光合速率、活性氧代谢的影响结果表明,有机-无机肥配施,特别是厩肥与化肥配合施用可明显减缓水稻植株衰老过程中叶片叶绿素的降解和光合速率下降,并有效抑制和调节叶片超氧化歧化酶(SOD)、过氧化氢酶(CAT)活性下降和脂质过氧化作用产物丙二醛(MDA)的增加,显著提高水稻粒重和籽粒产量。

The effects of different nutrient treatments on photosynthetic charaeteristics,metabolism of active oxygen of rice flag leaves in the latter stage are studied.The results show that the combined application of organic and inorganic manures,especially barn yard manure and chemical fertilizers can significantly delay the decomposition of chlorophll and the decrease of photosynthetic rate of rice flag leaves.In the meanwhile,the activities of superoxide dismutation (SOD) and catalase (CAT) and the increase of content of malondialdehyde (MDA) are controlled and adjusted resulting in the increases of the grain weight and grain yield.