【摘要】 探讨低割龄橡胶树热研7—20—59茎粗生长随月份时间变化的规律,为低割龄橡胶树生态管理和合理经营提供参考依据。对7割龄橡胶树品种热研7—20—59的茎粗生长进行定期、定株观测,利用回归分析方法对茎粗生长月动态进行分析。结果表明,低割龄橡胶树热研7—20—59茎粗生长量一年可达到2.76 cm;茎粗累积生长动态呈线性变化趋势,茎粗一年中月度增粗量呈现出明显的慢—快—慢的生长节律;构建了低割龄橡胶树热研7—20—59茎粗生长的回归模型Y=0.307X+61.307;根据聚类分析方法并结合橡胶树生长特点可将低割龄橡胶树热研7—20—59茎粗生长过程划分为速生前期(1—3月)、速生期(4—9月)和速生后期(10—12月);4—9月是低割龄橡胶树热研7—20—59茎粗生长关键时期,此时加强光热水和土肥等生态管理,可增加橡胶林生态系统生物量,进一步提高橡胶林生产力水平。更多还原

【Abstract】 The rubber tree stem diameter growth of month variation for low tapping age rubber tree clone CATAS7-20-59 was studied in order to provide reference for the ecological management technology. This article studied the stem diameter of seven tapping age rubber tree clone CATAS7-20-59 based on periodic and pointing observation method. A regression model was used to analyze stem diameter month growth rhythm of low tapping age rubber tree clone CATAS7-20-59. The results showed that stem diameter growth of low tapping age rubber tree clone CATAS7-20-59 could reach 2.76 cm, and cumulative growth dynamics of stem diameter showed linear trends, while net stem diameter monthly presented slow-fast-slow growth rhythm in the year. Stem diameter growth regression model Y = 0.307X + 61.307 of low tapping age rubber tree age CATAS7-20-59 was constructed. The growth course of the stem diameter might be partitioned into three periods of time by the sequential clustering analysis, namely pre-growing stage(from January to March), fast-growing stage(from April to September) and late-growing stage(from October to December). April to September is stem diameter growth critical period of low tapping age rubber tree clone CATAS7-20-59, and this period is good to strengthen ecological management of light, water, fertilizer and water, increasing the rubber forest ecosystem biomass, and to further improve the level of rubber forest productivity.更多还原