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在不同施钾肥条件下对春玉米子粒淀粉合成酶活性进行研究。结果表明,ADPG焦磷酸化酶、淀粉合成酶的活性在春玉米子粒灌浆过程中均呈单峰曲线变化,在一定的施钾肥用量范围内,增加钾肥用量,提高了ADPG焦磷酸化酶、淀粉合成酶活性,使ADPG焦磷酸化酶活性峰值出现日期提前。施钾肥能显著提高春玉米产量,四单19在施钾肥100kg/hm2时产量最高;丰禾10在施钾肥150kg/hm2时产量最高。淀粉合成酶活性与产量的相关性分析表明,在玉米吐丝后的21～35d,ADPG焦磷酸化酶活性与产量呈显著正相关;在吐丝后42d,可溶性淀粉合成酶(SSS)活性与产量呈极显著正相关;在吐丝后14～28d,束缚态淀粉合成酶(GBSS)活性与产量呈显著正相关。
The starch synthase activity of spring maize seeds was studied under different K application conditions. The results showed that the activities of ADPG pyrophosphorylase and starch synthase all showed single peak curve during the filling process of spring maize, and increased the amount of potassium fertilizer and increased the content of ADPG pyrophosphorylase, starch Synthetase activity, so that the ADPG pyrophosphorylase activity peak early date. Potash fertilizer application could significantly increase the yield of spring maize. Sangdan 19 had the highest yield when 100 kg / hm2 of potash fertilizer was applied; and the highest yield of Fenghe 10 when applied with 150 kg / hm2 of potassium fertilizer. Correlation analysis between starch synthase activity and yield showed that there was a significant positive correlation between ADPG pyrophosphorylase activity and yield between 21 and 35 days after silking. At 42 d after silking, the activity of soluble starch synthase (SSS) There was a significant positive correlation between yield and yield of bound starch synthase (GBSS) at 14-28 days after silking.