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《Acta Agrestia Sinica》 2017-04
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Effects of Clipping Height on Stress Resistance and Antioxidant Enzymes Activities of Dual-purpose Winter Wheat

WANG Yu-ping;YANG Jing-ning;WANG Dan-dan;YANG Qian;ZHANG Xiao-ming;SHEN Yu-ying;College of Pastoral Agriculture Science and Technology,Lanzhou University,State Key Laboratory of Grassland Agro-ecosystems,National Demonstration Center for Experimental Grassland Science Education(Lanzhou University);  
The effects of clipping on dual-purpose winter wheat physiological metabolism were studied in pot trials.Experiment was conducted at the greenhouse of college of pastoral agriculture science and technology of Lanzhou university.Three treatments were set up,including residue removal(CK),3 cm height(RE-3)and 6 cm height(RE-6).Each treatment had 40 replications.The seedling dry matter(DM),water soluble sugar(WSS),soluble protein concentration(SP),the activities of peroxidase(POD)and superoxide dismutase(SOD)were measured under different cutting intensities.The results showed that DM and WSS of above ground were significantly decreased with increasing clipping height.(P 0.05).Compared to CK,the leaf SP and above-ground SOD activity under RE-3 treatment were increased 18%~25%and 10%~30%,respectively(P 0.05);the stem POD activity was also increased 30% under RE-6 treatment(P 0.05).However,the under-ground POD activity was decreased with increasing clipping intensity,and under-ground SOD activity was not significantly affected by clipping intensity.Therefore,determining the optimum residue height and intensity of clipping to maximize winter wheat recovery was beneficial to dual-purpose use of wheat.
【Fund】: 甘肃省科技支撑计划-陇东黄土高原冬小麦粮饲兼用的技术体系研究与示范(1504NKCA081);; 教育部创新团队草地农业系统耦合与管理(IRT_17R50)资助
【CateGory Index】: S512.11
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