8个粮饲兼用玉米新品种产量与主要农艺性状的相关分析及综合评价

Correlation Analysis and Comprehensive Evaluation on Yield and Main Agronomic Traits of 8 New Maize Varieties for Both Grain and Forage

具有较高的生物产量和籽粒产量是粮饲兼用玉米新品种的重要评价指标。为客观评价粮饲兼用玉米品种的产量性状,以8个粮饲兼用玉米新品种为研究对象,通过田间试验,进行产量指标以及主要农艺性状的测定与比较,分析各指标间的相关性,采用隶属函数法对参试品种进行综合评价。结果表明,鲜草产量、干物质产量、籽粒产量3个产量指标之间密切相关;株高、穗位、绿叶数、穗粗等性状与生物产量的相关性较强,在提高粮饲兼用玉米生物产量方面具有重要作用;绿叶数与穗粗对粮饲兼用玉米籽粒产量提高也具有重要的作用。利用隶属函数法对筛选出的7个指标进行综合分析,发现国审品种Z710隶属函数值最高,其次为丹3232和丹32317。综合各项指标,Z710和丹32317整体表现良好,可作为粮饲兼用型玉米新品种进行种植,丹3232可作为以青贮玉米为主的粮饲兼用玉米备选品种。

High biological yield and grain yield are important evaluation indexes of corn varieties for both grain and forage.In order to objectively evaluate the yield performance of maize varieties for both grain and forage,8 new maize varieties for both grain and forage were selected as research objects,the yield index and main agronomic characters were measured and compared through field experiments,the correlation among the indexes was analyzed,and the comprehensive evaluation of the tested varieties was carried out by the method of membership function.The results showed that fresh grass yield,dry matter yield and grain yield were correlated closely.The plant height,ear position,green leaf number,ear diameter had a strong correlation with biological yield,which played an important role in the aspect of improving the biological yield for both grain and forage corn,and the green leaf number and the ear diameter also played an important role in increasing grain yield of grain and forage corn.The comprehensive analysis of the seven indexes screened out was put up by membership function method,and it was showed that the state approved new maize variety Z710 had the highest membership function value,followed by Dan 3232 and Dan 32317.Combination with various indicators,the conclusion was that comprehensive performances of Z710 and Dan 32317 were excellent,which could be used as new maize varieties for both grain and forage,and Dan 3232 could be used mainly for silage as an alternative variety of both grain and forage maize varieties.