不同抗早衰剂配方对杂交早稻后期叶片衰老的影响

以后期易早衰的春光2号为试验材料,研究了不同抗早衰剂对杂交早稻后期叶片衰老的影响。结果表明:施用不同抗早衰剂均能不同程度地提高功能叶的叶绿素含量、超氧化物歧化酶(SOD)活性、过氧化氢酶(CAT)活性、过氧化物酶(POD)活性和维生素C含量,降低功能叶细胞膜透性、丙二醛(MDA)含量和活性氧自由基(O2-.)产生速率,明显提高早稻的结实率和千粒重,延缓早稻的衰老,达到增产的效果。在4个不同抗早衰剂配方中,以抗早衰剂4号的效果最好,比喷清水对照增产10.0%,抗早衰剂1号次之,比喷清水对照增产9.0%,达到极显著或显著差异。

Effects of Formula of Anti-premature-senility Regulator on Leaves at Late Growth Stage in Hybrid Early Rice

"Chunguang 2",a hybrid early rice variety which tended to be premature senility,was used as the test material to study the effects of different anti-premature-senility regulators on leaves at the late growth stage in the hybrid early rice in this paper.The results showed that spraying the anti-premature-senility regulator could increase the activities of superoxide dismutase(SOD),catalase(CAT),peroxidase(POD) and vitamin C content to some extent and reduce cell membrane penetrability of the leaves,the content of MDA and the production rate of active oxygen radicals in the process of leaf senescence.Meanwhile,the anti-premature-senility regulator obviously improved the seed setting rate and 1000-grain weight to increase the yield of the early rice and delayed decrepitude.In the comparison of four different formulas,the anti-premature-senility regulator 4(APSR4) was the best,and the yield of APSR4 was the highest,which increased by 10.0% compared with CK.The yield of APSR1 was subordinate to that of APSR4.The yield of APSR1 increased by 9.0% compared with CK.Their differences were significant or very significant.