陇东塬区玉米不同发育期生长量对产量构成因素的影响

Affect of Corn Growth Quantity in Different Development Period on the Yield Consititution Factors

分析了陇东塬区玉米单株生长量对产量构成因素的影响。在7叶以前单株干物重和单株叶面积与营养器官的生长主要呈正相关,与产量构成因素以负相关为主;7叶以后不同器官的干物重对产量构成因素的贡献不同,叶、叶鞘、茎营养器官的干物质积累表现为慢-快-慢,对产量构成因素的贡献表现为高-低-高。穗的干物重和单株叶面积对产量构成因素呈递增趋势。

Analyzed the influence of the maize single growth mass to the yield constitute factor, the relation show positive correlation of single plant dry weight and single plant leaf area with the nutrition apparatus mainly, and it shows minus correlation with the yield constitute factors before seven leaves period. The contribution is different in dry weight of different apparatus to yield constitute factors after seven leaves period, the dry matter accumulate of leaf, sheath and caudex nutrition apparatus showed for slow to fast to slow, and them showed for high to low to high to yield constitute factors. The dry matter weight of spike and single plant leaf area showed increasing gradually to yield constitute factors.