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分析了沿海雨养型旱坡地新植甘蔗的产量结构，结果表明：在构成蔗茎产量的四个因素中，茎长、有效茎数、单茎重与产量之间有显著或机显著的正相关，而茎径与蔗茎产量之间的相关未达到显著水平。在产量相对较低的情况下，有效茎数与蔗茎．产量的关系更为密切；而在产量相对较高的情况下，单茎重、茎长、茎径与蔗茎产量关系的密切程度较高。通径分析结果表明：单茎重与有效茎数对蔗茎产量的直接效应，中下产量水平时以有效茎数为大，中上产量水平时以单茎重为大。在径长、茎径、有效茎数三者对蔗茎产量的柑接效应中，有效茎数的作用总是最大的，茎长在产量相对较低下作用比茎径大，而在产量相对较高时，作用比茎径小。分析结果认为，沿海雨养型旱坡地新植甘蔗的亩有效茎数以７５００条左右较为合适，单茎重轻是蔗茎产量的限制因素。
The results showed that among the four factors that constitute the yield of sugarcane, there were significant or significant positive correlations among stem length, effective stem number, single stem weight and yield , Whereas the correlation between stem diameter and cane yield did not reach significant levels. In the case of relatively low yield, the number of effective stems and cane stems. The relationship between yield and yield was more closely; while in the case of relatively high yield, there was a close relationship between the weight of stem, length of stem, stem diameter and yield of cane. The results of path analysis showed that the direct effects of single stem weight and effective stem number on the yield of cane, the effective stem number of middle and lower yield level were large, and the single stem weight was the largest in the middle and upper yield level. In stem diameter, stem diameter, the effective number of stalks on the cane yield of the three mandarin effect, the effective number of stalks is always the largest effect, the stem length at a relatively low yield role than the stem diameter, and the relative yield Higher, the role of stem diameter smaller. The results showed that about 7500 acres of sugarcane were suitable for planting sugarcane in coastal rain-fed arid slope, and the light weight of single stem was the limiting factor of sugarcane yield.