Analysis of Rational Close Planting with Agronomic Ttraits and Yield in Intense Tillering Ability Augarcane Variety
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (6): 1075-1082.DOI: 10.3969/j.issn.1000-2561.2019.06.006

• Crop Culture and Nutrition, Genetic Breeding • Previous Articles     Next Articles

Analysis of Rational Close Planting with Agronomic Ttraits and Yield in Intense Tillering Ability Augarcane Variety

QIU Lihang,FAN Yegeng,ZHOU Huiwen,CHEN Rongfa,HUANG Xing,LUO Hanmin,YANG Rongzhong,DUAN Weixing,LIU Junxian,WU Jianming()   

  1. Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences / Guangxi Key Laboratory of Sugarcane Genetic Improvement / Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs, Nanning, Guangxi 530007, China
  • Received:2018-10-22 Revised:2019-03-01 Online:2019-06-25 Published:2019-07-02
  • Contact: WU Jianming

Abstract:

Sugarcane (Saccharum officinarum L.) is an important sugar crop harvested mainly for millable canes. Tillering is the key to increase the millable canes thereby increasing per unit area yield and sugar yield. In this paper, sugarcane variety ‘B9’ (intense tillering ability) was planted in field plots treated with 4 different planting densities, i.e. 4000 buds/667 m 2 (P1), 6000 buds/667 m 2 (P2), 8000 buds/667 m 2 (P3), and 10 000 buds/667 m 2 (P4), and the plot experiment of one year new planting and one year sugarcane ratoon root was carried out to discuss the effects of planting density on the characters and yield of the sugarcane variety of intense tillering ability, and to analyze the correlation between them. The results showed that, the total seedlings number of planting cane and ratoon cane in the vigorous tillering period increased with increasing planting density, but the difference between them decreased with an average of 25.55%, 14.11%, -8.18% and -10.57%, respectively. The height of ratoon cane was significantly higher than that of planting cane, with an average increase of 17.31%, 10.54%, 19.44% and 14.88%, but the stem diameter was almost unaffected by planting density. Except the result of P2, the millable canes and yield of planting cane increased with the increase of planting density, and although millable canes of planting cane was more than that of ratoon cane, but its yield showed an opposite result. The difference of Brix between low planting density (P1) and high planting density (P4) was significant and showed a decreasing trend. In the process of yield formation under our test conditions, planting density was positively correlated with the total number of sugarcane seedlings at the vigorous tillering stage, plant height, millable canes and yield, negatively correlated with stem diameter and Brix, and then the contribution of plant height and millable canes to yield was the most significant, but too many millable canes were not obviously good for Brix in sugarcane. Therefore, the results indicate that the rational close planting is very important for the formation of yield and quality of the sugarcane variety of intense tillering ability.

Key words: sugarcane, tillering, rational close planting, agronomic traits, yield

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