复合型生长调节剂对玉米生长和产量的影响

Effects of Plant Growth Regulators Compound on Growth and Yield of Maize(Zea mays L.)

施用植物生长调节剂能够调节作物株高、改变株型影响作物的抗逆性和产量。试验以哲单37(特早熟,113 d)、先玉335(中早熟,118 d)、郑单958(中熟,120 d)和农大108(晚熟,125 d)等4个玉米品种为材料,分两个时期播种,在拔节期分别喷施两种调节剂。结果显示:玉米拔节期喷施调节剂-A后能够提高玉米持绿叶片数、叶面积和干物重,而降低黄叶数,为成熟期产量的形成提供基础;在成熟期显著提高先玉335、郑单958和农大108的产量,主要影响因素是百粒重和行粒数。调节剂-B能够显著缩短玉米第1节到第4节的节间距,从而降低植株的高度,通过缩短生育期使晚熟品种农大108正常成熟,提高产量。

Application of plant growth regulator can affect stress resistance and yield by adjusting plant height, changing plant types. In this study, ’Zhedan 37＇ （earlier maturing, 113 d）, ‘Xianyu 335＇ （mid-early maturing, 118 d）, ‘Zhengdan 958＇ （medium maturing, 120 d） and ‘Nongda 108＇ （late maturing, 125 d） were sown at two dates, and two kinds of plant growth regulators were applied at jointing stage. Results showed that application of plant growth regulators A at jointing stage increased number of stay green leaves, leaf area and dry matter weight, and decreased number of yellow leaves, and provided basis for yield formation at mature stage. Application of plant growth regulators obviously improved yield of ‘Xianyu 335＇, ＇Zhengdan 958＇, and ‘Nongda 108＇ at mature stage, and the main influence factors were 100-kernel weight and kernels per row. Application of plant growth regulators B obviously shortened the distance between the first node to forth node, then decreased the plant height, and shortened growth period duration, then insured the mature of ‘ Nongda 108＇ and increased maize yield.