高丹草品种主要农艺性状的比较研究

Comparative Research on Main Characteristics of Pacetter Varieties

在日本北海道气候条件下,对6个高丹草品种的生长适应性及主要农艺特性进行了研究。田间观察6个品种生长势强,均能适应当地气候条件,但在生物学及生产性能方面品种间存在差异。发育前期及后期生长速度快的品种为Mnqsi No.1和Mnqsi No.2,最慢的品种为Greensorgo和Raceysorgo,品种Grenn-A在发育后期生长较快,Sudancums次之。Greensorgo和Raceysorgo为早熟型品种,Mnqsi No.1、Mnqsi No.2和Green-A均为晚熟型品种,Sudancums为中熟型品种。株高、鲜草产量顺次为:Mnqsi No.1>Green-A>Mnqsi No.2>Sudancums>Greensorgo>Raceysorgo;茎粗、茎叶比顺次为:Green-A>Sudancums>Greensorgo>Mnqsi No.2>Raceysorgo>Mnqsi No.1;分蘖能力顺次为:Mnqsi No.2>Mnqsi No.1>Sudancums>Raceysorgo>Green-A>Greensorgo。穗型及叶片特征品种间有一定差异。

The growth adaptability and main agronomic characteristics of 6 pacetters varieties were studied in the climate conditions in Hokkaido of Japan.The results of field observation showed that the growth potentiality of 6 varieties were stronger,and could adapt to the weather condition of Hokkaido,but the varieties had certain difference on the biology characteristics and production performance.At earlier and later stage,the fastest varieties were Mnqsi No.1 and Mnqsi No.2 in growth rate,and the slowest varieties were Greensorgo and Raceysorgo,the growth rate of GrennA was faster at later stage than Sudancums.Greensorgo and Raceysorgo were the early mature varieties,Mnqsi No.1,Mnqsi No.2 and Green-A were the later mature varieties,Sudancums was medium mature varieties.The plant heights and the yield of fresh forage of 6 varieties were Mnqsi No.1>Green-A>Mnqsi No.2>Sudancums>Greensorgo>Raceysorgo respectively;the stem diameter and the ratio of stems to leaves were Green-A>Sudancums>Greensorgo>Mnqsi No.2>Raceysorgo>Mnqsi No.1 respectively;the tiller numbers of per plant were Mnqsi No.2>Mnqsi No.1>Sudancums>Raceysorgo>Green-A>Greensorgo respectively.The spike type and leaves characteristics had certain difference among varieties.