摘要： 通过相关、回归分析及通径分析,研究了10个甜高粱品种自上而下各茎节锤度以及茎节锤度与茎秆锤度、榨汁率的关系。结果表明:自上而下各茎节锤度呈现出低一高一低的变化趋势,不同甜高粱品种茎秆的锤度最高值都出现在中上部。总体上说可以用第7或第8节锤度代表茎秆锤度,但对于不同甜高粱品种来说,能代表茎秆锤度的茎节不同。各茎节平均锤度可以代表茎秆锤度。第1,3,7,9茎节的锤度对茎秆锤度表现出正直接效应,其中第7和9节直接效应值最大,而第4,6,8,10节的锤度具有负值效应;第1,2,7,8茎节对榨汁率表现出正直接效应,其中第8节直接效应值最大,而第3,5,9,10节直接通径系数都是负值,不利于提高甜高粱茎秆的榨汁率。

关键词: 甜高粱, 茎节, 锤度, 榨汁率, 相关分析, 通径分析

Abstract: The brixs and correlations between individual internodes and the whole stem, sap squeezing rate of 10 sweet sorghum varieties were studied through the correlation and regression analysis and path analysis.The results showed as following:The birx velue in individual internodes from the top of the stem to the bottom was fluctuated as low- highlow. The values of birxes in the central and upper internotes counted from the top of the stem were the highest. In the overall the birx value of the whole stem could be represented with the values of 7th and 8th intemotes, but the intemotes　are different regarding different sweet sorghum varieties.The birx value of the whole stem could be represented with the mean birx of all internodes. The brix degrees of the individual internodes of the 1st, 3rd, 7th and 9th internodes ha highly direct positive effects on the birx of the whole stem. The birx degree of the 7th and 9th internode had a high direct pos-i tive effect on the birx of the whole stem. The birx of the 4 th, 6th, 8th and 10th internodes had high direct negative effecton the birx of the whole stem. The brix degrees of the individual internodes of the 1st, 2rd, 7th and 8th internodes had high directly positive effects on the squeezing rate.The birx degree of the 8th internode had a high directly positive effect on the squeezing rate. The birx degree of the 3th, 5th, 9th and 10th internodes had high directly negative effects on the squeezing rate.

Key words: Sweet sorghum, Internodes, Birx, Sap squeezing rate, Correlation analysis, Path analysis

中图分类号: 

• S514