北移区木薯品种产量特征的相关分析  

Correlation Analysis of Yield Characteristics of Cassava Varieties Planted in Jiangxi Province

作　　者：林洪鑫[1,2] 刘仁根[1] 袁展汽[1] 肖运萍[1] 汪瑞清[1] 吕丰娟[1] 

机构地区：[1]江西省农业科学院土壤肥料与资源环境研究所/农业部长江中下游作物生理生态与耕作重点实验室/国家红壤改良工程技术研究中心,江西南昌330200 [2]江西农业大学,江西南昌330045

出　　处：《江西农业学报》2016年第12期1-7,共7页Acta Agriculturae Jiangxi

基　　金：现代农业产业技术体系建设专项"国家木薯产业技术体系南昌综合试验站"(CARS-12-jxyzq);江西省农科院青年创新基金(2013CQN010)

摘　　要：通过分析北移区99个木薯品种的指标特征,提出了决定产量的关键指标,为北移区木薯育种和品种引进提供依据,结果表明:13个指标中以单株茎叶鲜重、单薯鲜重和单株薯鲜重的变异系数较大,而茎径、干物质率和薯径变异系数略小。相关分析表明:薯长、单薯鲜重和收获指数与鲜薯产量呈极显著线性正相关,而茎径、薯径、单株茎叶鲜重、单株薯鲜重和生物产量与鲜薯产量呈极显著抛物线正相关,达到最高鲜薯产量时,茎径3.92 cm、薯径5.56 cm、单株茎叶鲜重4.16 kg、单株鲜薯重4.76 kg和生物产量104.53 t/hm2。通径分析表明:单薯鲜重和单株茎叶鲜重对产量的直接作用较大,而株高和生物产量对产量的直接作用较小。因此,薯长、薯径、茎径、单薯鲜重、收获指数、单株茎叶鲜重、单株薯鲜重和生物产量是决定北移木薯产量的主要指标。Through the analysis of 99 cassava varieties with high yield index characteristics in Jiangxi Province, this paper proposed the key indexes affecting the yield, in order to provide basis for cassava breeding and variety introduction in this prov- ince. The results showed that： among 13 indexes, the single-plant stem and leM fresh weight, single-tuber fresh weight and sin- gle-plant tuber fresh weight had larger variation coefficient, while stem diameter, dry matter rate and tuber diameter had smaller variation coefficient. Correlation analysis showed that fresh tuber yield had a very significant linear positive correlation with tuber length, single-tuber fresh weight and harvest index, and it was also very significantly parabolically correlated with stem diameter, tuber diameter, single-plant stem and leaf fresh weight, single-plant tuber fresh weight, and biomass; when fresh tuber yield reached the highest value, stem diameter, tuber diameter, single-plant stem and leaf fresh weight, single-plant tuber fresh weight and biomass were 3.92 cm, 5.56 cm, 4.16 kg, 4.76 kg and 104.53 t/hm2, respectively. Path analysis indicated that sin- gle-tuber fresh weight and single-plant stem and leaf fresh weight had a larger direct effect on fresh tuber yield, but plant height and biomass had a smaller direct effect on it. Therefore, tuber length, tuber diameter, stem diameter, single-tuber fresh weight, harvest index, single-plant stem and leaf fresh weight, single-plant tuber fresh weight, and biomass were the main indexes that determined the yield of cassava in Jiangxi Province.

关 键 词：木薯 北移区 产量特征 相关分析 

分 类 号：S533[农业科学—作物学]