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探究脱落酸(ABA)与氮磷钾肥配合施用对生育中后期受渍小麦生理特性及产量的减缓调控作用,为化控调节小麦生长提供科学依据。2014-2015年通过大田试验,以郑麦9023为试验材料,在孕穗期、灌浆期各设置受渍10d的水分胁迫组,于渍水结束后,喷施复配化控试剂(0.05μmol/L ABA、2%尿素和0.3%磷酸二氢钾的混合液),以受渍处理喷施清水的小区为对照(CK),测定叶片膜脂过氧化参数,叶绿素、可溶性蛋白含量等,并考察植株生长状况及产量。结果表明,与CK相比,孕穗期、灌浆期受渍后喷施复配化控试剂,丙二醛(MDA)含量、可溶性糖含量和过氧化物酶活性显著降低;叶绿素、可溶性蛋白含量及超氧化物歧化酶活性显著上升。孕穗期受渍,复配化控溶液使产量提高的原因主要是粒数的增加;而在灌浆期受渍,产量的提高主要是粒重的增加和不孕小穗数的减少。孕穗期受渍喷施复配化控试剂与氮磷钾肥溶液,产量分别提高17.4%和13.4%;而在灌浆期,产量相应提高5.4%和4.2%。ABA和氮磷钾肥配合喷施可缓解孕穗期受渍小麦的生理伤害,促进产量提高。
To investigate the synergistic effect of abscisic acid (ABA) and NPK fertilizers on the physiological characteristics and yield of wheat at mid and late growth stage, and to provide a scientific basis for chemical control of wheat growth. Through field experiments and Zhengmai 9023 as tested material, we set water stress group under water stress for 10 days at booting stage and filling stage from 2014 to 2015. After the waterlogging was finished, the chemical control agent (0.05μmol / L ABA, a mixture of 2% urea and 0.3% potassium dihydrogen phosphate) was used as CK. The membrane lipid peroxidation parameters, chlorophyll, soluble protein content and the like were measured. Growth status and yield. The results showed that compared with CK, the chemical control agents were sprayed at the booting stage and the filling stage, and the contents of malondialdehyde (MDA), soluble sugar and peroxidase were significantly decreased at the booting stage and filling stage. The contents of chlorophyll, soluble protein, Superoxide dismutase activity increased significantly. Booting at the booting stage, compounding the control solution to increase the yield is mainly due to an increase in the number of grains; while in the filling stage, the increase in grain yield is mainly due to an increase in grain weight and a reduction in the number of spikelets. At the booting stage, the chemical control agents and NPK fertilizers were sprayed and the yield was increased by 17.4% and 13.4% respectively; while during the filling stage, the yield was increased by 5.4% and 4.2% respectively. ABA and NPK fertilizers can alleviate the physiological damage of wheat at the booting stage and promote the yield increase.