摘要
通过田间小区试验,在低施肥常规田间管理条件下,研究了不同秸秆还田量下接茬冬小麦旗叶叶绿素(Chl)含量、净光合速率(Pn)、超氧化物岐化酶(SOD)活性、过氧化物酶(POD)活性、丙二醛(MDA)含量和可溶性蛋白(SP)含量的变化特征及其之间的关系。结果表明,低施肥常规田间管理条件下,接茬冬小麦旗叶叶绿素含量、净光合速率、超氧化物岐化酶活性和可溶性蛋白的变化随秸秆还田量的增加呈单峰趋势,过氧化物酶和丙二醛的变化随秸秆还田量的增加呈单谷趋势。秸秆还田对冬小麦旗叶衰老的影响主要是通过影响保护酶的水平,尤其是POD作用更大。在本试验条件下,玉米秸秆还田量为9000kg/hm2的处理各抗衰老性指标最好,抗衰老隶属函数综合评价值最大,产量最高;玉米秸秆还田量为15000kg/hm2的处理各抗衰老性指标最差,抗衰老隶属函数综合评价值最小,产量最低。在本地区低施肥常规田间管理下,9000kg/hm2的玉米秸秆还田量对接茬冬小麦旗叶抗衰老性及增产较为适宜。
The change characteristic and the relation of chlorophyll content, photosynthesis rate, SOD activity, POD activity, malondialdenhyde content and soluble protein were studied in the condition of lowly applying fertilizer under the convention management condition through field plot experiment. The results indicated that the change of docking-stubble winter wheat flag leaf chlorophyll, photosynthesis speed, SOD and soluble protein content assume the single peak tendency along with the increasing amount of Ploughing Corn Straw under Soil ; the change of POD and MDA assume the single valley tendency along with the increasing amount of Ploughing Corn Straw under Soil in the condition of Lowly applying fertilizer under the convention management condition, The effects of Ploughing corn Straw under Soil on the wheat flag leaf senescence mainly are to influence the level of protection enzyme, particularly the POD. Under this test condition, the rate of 9000 kg wheat straw /hm^2 is best on each anti-senility target, the value of anti-senile membership function and the output; the rate of 15000 kg wheat straw /hm^2 is worst. Therefore, lowly applying fertilizer under the convention area, ploughing corn straw under soil had the most favorable effect at the rate of 9000 kg wheat straw /hm^2
出处
《生态学报》
CAS
CSCD
北大核心
2009年第9期4967-4975,共9页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目(30671227
30300213
30070439)
国家教育部新世纪优秀人才支持计划资助项目(NCET-07-0700)
国家"十一五"科技支撑计划资助项目(2006BAD15B06)
陕西省自然科学基金资助项目(2006C104)
关键词
玉米秸秆还田
冬小麦
旗叶
衰老效应
ploughing corn straw under soil
winter wheat
flag leaf
senescence effect
