花粒期干旱对春玉米产量及品质影响的研究

为保证黑龙江省玉米的高产稳产,以嫩单14玉米杂交种为试验材料,通过对花粒期的不同生育时期进行干旱胁迫处理,对春玉米的植株性状、产量性状及其品质进行测定,分析了花粒期干旱胁迫对产量及品质的影响。结果表明:花粒期不同生育时期干旱胁迫春玉米株高、单株干重、单株叶面积、产量及产量构成因子均有不同程度下降。穗粒数在抽雄期干旱处理降低幅度最大,百粒重在灌浆期干旱处理降低幅度最大,单株产量在抽雄期干旱胁迫处理减产最大;抽雄期、吐丝期和灌浆期干旱胁迫处理使籽粒粗脂肪含量下降,粗蛋白含量升高。

Study on the Yield and Quality of Spring Maize under Drought Stress at the Stage of Flowering and Seeding

The maize hybrid species of Nendan14 was used as experiment materials,the spring maize plant traits,yield and quality traits were measured to analyze the yield and quality of spring maize under drought stress at the stage of flowering and seeding to ensure the high yield and stable of Heilongjiang maize.The results showed that the height,dry matter weight of single plant,leaf areas of single plant,yield and yield components were reduced in different extent;The grate decrease of grain number per ear was under the drought stress at stasseling stage;The grate decrease of 100-grain weight was under the drought stress at filling stage;The grate decrease of 1 grain yield per plant was under the drought stress at tasseling stage.The drought stress at tasseling,silking and filling stages could decrease the content of seed crude fat and increase crude protein