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Chinese Agricultural Science Bulletin

Abbreviation (ISO4): Chin Agric Sci Bull      Editor in chief: Yulong YIN

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Study on the Dynamic Characteristics of Growth and Nutritive Compositions in Jumbo

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Online published: 2004-04-04

Abstract

Jumbo was introduced into China in 1999.It was suited to planting in farmland in Xiliaohe Plain.The mean of plant height could reach 350cm-360cm and the maximum increasing rate of plant height appeared with 5.50cm/d. The maximum rate of dry matter accumulation of single plant came to 5.3g/d. It’s maximum LAI was 14.72 and the period of LAI>5 lasted more than 90 days. The rate of stalk weight to leaf weight lasted increasing.The trend of rate of fresh weight to dry weight appeared a single peak and the rates were smaller in later than in former. There was significantly negative correlation with r=-0.9894 between crude protein(%) and plant height(cm),while significantly positive correlation with r=0.9765 between crude fiber(%) and plant height(cm).The liner regression equations could be respectively expressed as: y=21.9853-0.0543x; y=16.1915+0.0404x. The hay yield continuously increased while the fresh yield and crude protein yield lightly droped in later growing period.

Cite this article

Yang Hengshan,Cao Minjian,Zhang Ruifu,Li Fenshan . Study on the Dynamic Characteristics of Growth and Nutritive Compositions in Jumbo[J]. Chinese Agricultural Science Bulletin, 2004 , 20(2) : 69 -69 . DOI: 10.11924/j.issn.1000-6850.040269

References

1 汪家灼,陈佳敏,张淑霞,等.速生、优质的高产牧草—健宝牧草[J].种子,2002(3):90—91
2 宁开桂编著.实用饲料分析手册[M].北京:中国农业科技出版社,1993,31—81
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