橡胶RRIM600的产量与产量构成因素的通径分析  

Path coefficient analysis between yield components and yield of RRIM600 of Hevea brasiliensis

作　　者：吴春太[1,2,3] 马征宇 刘汉文 李维国[1,2,3] 黄华孙[1,2,3] 

机构地区：[1]中国热带农业科学院橡胶研究所,海南儋州571737 [2]国家橡胶树育种中心,海南儋州571737 [3]农业部橡胶树生物学与遗传资源利用重点实验室,海南儋州571737 [4]海南天然橡胶产业集团阳江分公司,海南琼中572900

出　　处：《湖南农业大学学报（自然科学版）》2014年第5期476-480,共5页Journal of Hunan Agricultural University(Natural Sciences)

基　　金："十二.五"现代农业产业技术体系--国家天然橡胶产业技术体系专项(CARS–34)

摘　　要：为进一步发挥巴西橡胶品种RRIM600的增产潜力,利用相关、通径和逐步回归分析方法,分析了不同割龄(9、15、17、18、19、20、21、23、29、33年)下,RRIM600作为长期作物栽培的割株数、每割次株产干胶量、割胶刀数等产量构成因素对产量的影响。结果表明:RRIM600不同割龄的干胶产量存在较大差异,其中以17年割龄的产量为最高,达1 273.94 kg/hm2,18年的产量最低,仅为471.06 kg/hm2;5个产量性状中,对产量的直接贡献由大到小的性状依次为每公顷有效割株数、年均割次株产干胶量、存树率、年割胶刀数、在割率,提高每公顷有效割株数可最有效提高RRIM600的产量,其次是提高年均割次株产干胶量;不同割龄间,每公顷有效割株数的变异系数最大(25.71%),其次为年均割次株产干胶量的(23.45%),年割胶刀数的变异系数最小(9.67%)。综合上述结果,海南省植胶地区应在适宜的年割胶刀数基础上,以增加每公顷有效割株数和年均割次株产干胶量为突破口,充分协调三者的关系,力争实现产量和效益最大化。To further exploit the yield increasing potential of Hevea brasiliensis clone RRIM600, correlation, path coefficient and stepwise regression analyses were conducted to analyze the constitutions including the number of tappable trees, dry rubber yield per tree per tap and the number of tapping etc. of RRIM600 which is a season-long crop under tapping ages of 9, 15, 17, 18, 19, 20, 21, 23, 29 and 33 years. The result indicated that there was big difference in dry rubber yield of RRIM600 among the ten ages of tapping, among which the highest yield was in tapping age of 17 years （1 273.94 kg/hm^2）, while the lowest yield was in tapping age of 18 years （471.06 kg/hm2）. Among the 5 yield traits, the number of tappable trees per hectare showed the biggest contribution to yield, followed by mean dry rubber yield gram per tree per tapping, survival rate of trees, the number of tapping per year, and tapping tree percentage; Increasing the number of tappable trees per hectare is the most effective way to increase the yield of RRIM600, followed by increasing the mean dry rubber yield gram per tree per tapping and the number of tapping per year. The variation coefficient of the number of tappable trees per hectare during different tapping ages was the highest （25.71%）, followed by mean dry rubber yield gram per tree per tapping （23.45%）; the number of tapping per year showed the lowest （9.67%） variation coefficient. In conclusion, to achieve the maximum yield and benefit, the breakthrough should be increasing the number of tappable trees per hectare and mean dry rubber yield gram per tree per tapping based on the optimum number of tapping per year, and fully coordinating the relationship among the three indexes.

关 键 词：巴西橡胶 RRIM600 产量构成 通径分析 变异系数 

分 类 号：S794.104[农业科学—林木遗传育种]