以德美亚1和德美亚2为试验材料,采用大田试验方法,于7展叶期喷施植物生长调节剂激动素(KT)和烯效唑(S3307),清水为对照,研究调节剂对玉米子粒建成及产量的调控效应。试验结果表明,喷施调节剂后第30~39 d,两处理均显著增加子粒的鲜重、干重、体积和可溶性糖含量。喷药后第48 d,不同品种的子粒淀粉含量和淀粉积累量呈现不同的变化规律,其中,D1-KT和D2-S处理的调控效果较好。喷药后第30~48 d,德美亚1和德美亚2子粒转化酶活性呈“上升-下降”的变化趋势,不同品种间呈现相同的变化趋势。综上可以推测,植物生长调节剂均显著改善了子粒的形态,加快了子粒的新陈代谢,扩充了子粒库容量,进而提高了玉米产量。
英文摘要:
A comparative study was conducted on the effect of spraying plant growth regulations of kinetin (KT) and uniconazole (S3307) on the building of grains in maize. Two maize (Zea mays) varieties, Demeiya 1 and Demeiya 2 were used as experimental materials. The results indicated after 30~39 days’ of spraying, the fresh weight, dry weight, volume and soluble sugar content in the two grains samples were always significantly higher than those in control . At the 48th day of spraying, the starch content and starch accumulation showed different trends between Demeiya 1and Demeiya 2. Demeiya1’s starch content and starch accumulation sprayed with KT were higher than with S3307, and Demeiya2’s starch content and starch accumulation sprayed with S3307 were higher than with KT. The invertase activity in grains showed rise-reduce trend between Demeiya 1and Demeiya2. In summary, foliar application of plant growth regulators could significantly improve morphological indexes and enhance physiological metabolism in seven expanded leaves. Regulators could significantly enhance physiological activities and enlarge the storage capacity of grains. Thereby, S3307 and KT were effective to increase seed yield.
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