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以甘蔗新品种粤糖04-252为材料,分析了其蔗茎产量、含糖量和蔗糖分丰产性和稳产性,同时对其对其蔗茎产量及其构成因子之间进行了等级结构分析、相关分析、多元回归分析、通径分析和决定系数分析。丰产性和稳定性分析结果表明,粤糖04-252蔗茎产量、含糖量以及各期甘蔗蔗糖分均高于ROC22,稳产性能比ROC22好,受环境因素的影响较小,适应性较广。产量结构分析表明,公顷产蔗量在100～110 t之间的较合理群体结构为有效茎数在7.0～7.8万条/hm2、茎长在229.0～279.0 cm、茎径在2.55～2.95 cm。相关分析表明,蔗茎产量与产量构成因子茎径、茎长和有效茎数都呈极显著正相关关系。其中与有效茎数简单相关系数最高,与茎径偏相关系数最大。多元回归分析结果表明,蔗茎产量与其构成因子间存在着真实的线性关系。通径分析和决定系数分析表明,茎径对蔗茎产量的直接效应和直接决定系数最大,其次是有效茎数,茎长最小,三者对蔗茎产量的通径系数均达到极显著正相关,作用方式以直接效应为主。综上所述,粤糖04-252是一个有效茎数多、植株中高、中大茎至大茎的甘蔗新品种,根据其种性分析,茎径和有效茎数是决定粤糖04-252蔗茎产量的关键因子,同时要兼顾茎长。
A new sugarcane variety Yueshun 04-252 was used as material to analyze its yield, sugar content, yield stability and yield stability of sucrose, and its hierarchical structure was analyzed between its yield and its components , Correlation analysis, multiple regression analysis, path analysis and decision coefficient analysis. The results of high yield and stability showed that the yield and sugar content of sugarcane in sugarcane 04-252 and the sucrose content of sugarcane in each phase were higher than that of ROC22, and the yield stability was better than that of ROC22, but less affected by environmental factors and more adaptable . The analysis of yield structure showed that the reasonable population structure with 100 ~ 110 t hectares of sugarcane yield per hectare was effective stalk number 7.0-7.8 thousand / hm2, stem length 229.0-279.0 cm and stem diameter 2.55-2.95 cm. Correlation analysis showed that there was a significant positive correlation between yield and stem yield, stem length and number of effective stems. Among them, the simple correlation coefficient with the effective stem number was the highest and the correlation coefficient with the stem diameter was the highest. Multiple regression analysis showed that there was a true linear relationship between yield and its components. Path analysis and determination coefficient analysis showed that the direct effect and direct determination coefficient of stem diameter on yield of cane were the largest, followed by the effective stem number and the stem length were the smallest. The path coefficient of stem yield reached a very significant positive correlation , The mode of action to the direct effect of the main. In summary, YUEQING 04-252 is a new effective sugarcane variety with high, medium and large stalks to large stalks. According to its species analysis, stem diameter and number of effective stalks are determined by YG 04-252 Cane yield key factor, taking into account stem length.