摘要
【目的】探讨橡胶树茎粗生长的季节变化规律,为开展橡胶树速生高产抚育和植胶生产技术经济管理提供参考依据。【方法】定株定期观测5龄胶木兼优品系热垦628的茎粗生长量,采用Logistic方程对其进行拟合,并对茎粗生长量与影响茎粗生长的气象因子进行灰色关联度分析。【结果】Logistic方程能较好地拟合橡胶树茎粗生长规律,茎粗生长呈“慢—快—慢—快—慢”的节律,根据聚类分析方法并结合橡胶树生长特点可将橡胶树茎粗生长过程划分为生长初期（1~2月）、速生期（3~10月）和生长后期（11~12月）,速生期主要集中在夏季和秋季。关联度分析结果表明,降水量对橡胶树茎粗生长影响最大,而日照时数影响最小。【结论】橡胶树茎粗生长全年没有停止期或休眠期,只要结合橡胶树物候期进行水分、肥料和光照等农业资源的科学合理配置,即可实现橡胶树速生高产。
[ Objective ]Seasonal growth rhythm of stem diameter of rubber tree was discussed to provide references for fast-growing and high-yielding rubber tree planting, rubber production tending and economic management technology. [Method]The stem diameter of 5-year timber/latex rubber tree clone Reken 628 was studied based on periodic and pointing observation method. A logistic equation was formulated, and stem diameter growth increment and the meteorological factors were analyzed using gray correlation method. [Result]The results revealed that stem diameter response fitted the logistic equation preferably. The growth increment displayed a distinct alternation of ＂slow-fast-slow-fast- slow＂ rhythm. The growth course of the stem diameter might be partitioned into three periods by the sequential cluster- ing analysis,namely pre-growing （January-February）,fast-growing （March-October） and late-growing stage （Novem- ber-December）. Summer and autumn were the major fast-growing periods. The gray correlation analysis revealed that precipitation had the most significant influence while solar radiation hours had the least impact on stem diameter growth of 5-year timber/latex rubber tree clone Reken 628. [ Conclusion ] There is no dormant or stopping period for stem diameter growth of rubber tree throughout the whole year. Stem diameter grows the fastest mainly in summer and autumn. Based on the rubber tree phenophase, scientific and reasonable configuration of water, fertilizer and light agricultural resources can make rubber tree grow fast with high yield.
出处
《南方农业学报》
CAS
CSCD
北大核心
2015年第1期91-95,共5页
Journal of Southern Agriculture
基金
现代农业产业技术体系建设专项项目(CARS-34-GW5)
关键词
巴西橡胶树
茎粗
季节变化规律
LOGISTIC方程
灰色关联度
Brazil rubber tree （Hevea brasiliensis）
stem diameter
seasonal growth rhythm
Logistic equation
gray correlation
