甘蔗叶片生长与蔗茎生长关系的研究

A Study on the Relationship between the Leaf and Cane Growth in Sugarcane (Saccharum offcinarum L.) Production

选用粤糖63／237、粤糖71／210、桂糖1号作试验材料，通过对苗期、分蘖期、伸长期的叶长、叶宽、正叶数、叶鞘长、茎高、茎径等指标的测定及统计分析．研究甘蔗叶片生长与蔗茎生长的关系。结果表明．三个品种在三个时期的时竟与茎高、茎径都呈正相关关系，且对茎高、茎径的正贡献达到差异显著或极显著水平新长、正叶数与茎高、茎径的关系因品种、生育期不同而异．有正相关的促进作用，也有负相关的负贡献作用；叶鞘长与茎高、茎径主要呈负相关关系。因而认为，叶宽、叶鞘长可以作为选评甘蔗优良品种的参考指标；劳力不足地区甘蔗生产可以不剥叶。

The sugarcane varieties Yuetang 63/237, Yuetang 71/210 and Guitang Nol were plantedas experimental materials in the study on the relationship between leaf and cane growthes through thedetermination of and statistical analysis on leaf length, leaf width, the number of full spread leaves,sheath length, cane height and cane diameter during seeding, tillering and stem elongation periods insugarcane production. The results showed that there was a positive correlation between leaf width andcane height or cane diameter during those three periods of growth in the three varieties. Furthermore,the differents of the contribuction leaf width made to the development of cane height and Cane diameter reached significant or very slgnificant levels. The relations between leaf length or the number of fullspread leaves with cane height or cane diameter varied with different varieties of different growthstages. Some were positive, others negative. The relations between sheath length and cane height orcane diameter were basically negative correlations. Therefore, in sugarcane breeding leaf width andsheath length may be consldered as selection criterions for variety improvement. In some areas laboureris in shortage leaf stripping can be avoided.