青贮玉米不同器官与产量和品质的相关性研究

为了在培育高产优质青贮玉米新品种过程中,提高选择效率,筛选源库比例适宜,营养品质较好的品系,从整株角度对青贮玉米不同器官与产量和品质的相关关系研究,在田间条件下以31份青贮玉米优良品种/系为试验材料,研究青贮玉米各器官与产量和品质关系。结果表明:选取的不同品种/系青贮玉米的干物质质量、含水量、产量和品质均有较大差异,通过相关分析表明,茎秆、叶片(r2产量=0.528**)和苞叶占总干物质比例与单株含水量和产量呈正相关,籽粒和穗轴占总干物质比例与单株含水量和产量呈负相关;茎秆(r2=0.396*)、苞叶和穗轴占总干物质质量比例与整株中性洗涤纤维含量呈正相关,叶片和籽粒(r2=0.381*)占总干物质质量比例与其呈负相关;茎秆和苞叶占总干物质质量比例与整株酸性洗涤纤维含量呈正相关,叶片、籽粒和穗轴与其呈负相关。茎秆、叶片和苞叶占总干物质质量比例与粗蛋白含量呈正相关,籽粒和穗轴(r2=0.660**)占总干物质质量比例与其呈负相关;茎秆(r2=0.407*)、叶片和苞叶占总干物质质量比例与整株淀粉含量呈负相关,籽粒(r2=0.359*)和穗轴占总干物质质量比例与其呈正相关。

Study on the correlation of the different organs and the yield and quality in silage maize

The study aims to understand the whole plant yield and quality of silage maize in different organs and the relationship between the organs and improve the efficiency of selection, provide theoretical basis for breeding high yield and high quality silage maize varieties. This field experiment was conducted to elucidate the correlation of the radio of different organs to total weight and the yield and quality in silage maize (Zea mays L.) with thirty-one silage maize cultivars or lines as materials. The variation of total dry matter weight, dry matter weight of different organs, water content, yield and quality was significantly different. The correlation analysis results indicated that the radio of stalk, leaves (r2=0.528**) and bracts to total weight had positive correlations with total water content and yield, while the radios of kernel and cob to total weight had negative correlations with total water content and yield. Proportions of stalk (r2=0.396*), bracts, and cob in total dry matter were positively correlated with neutral detergent fiber content, while proportions of leaves and kernel (r2=0.381*) in total dry matter were negatively correlated with neural detergent fiber content. Total quality ratios of stalk and bracts to total dry matter and the whole plant acid detergent fiber content were positively correlated, while the ratios of leaves, kernels and cob were negatively correlated with total dry matter and the whole plant acid detergent fiber content. Total quality ratios of stalk, leaves and bracts to total dry matter and crude protein content were positively correlated, while the ratios of kernels and cob (r2=0.660**) were negatively correlated with total dry matter and crude protein content; Proportions of Stalk (r2=0.407*), leaves and bracts in total dry matter were negatively correlated with whole plant starch content, while proportions of kernels (r2=0.359*) and cob were positively correlated with whole plant starch content.