摘要
【目的】探究截冠等营林措施对柏木母树结实状况的影响,改善种子园存在的结实部位高、种子产量低等问题,以提高种子园的良种生产潜力,为提高种子园的截冠管理提供参考。【方法】以四川省三台县金鼓国家柏木良种基地30 a生柏木母树为研究对象,采用混合均匀设计法分析截冠(X_(1))、赤霉素GA_(3)(X_(2))、赤霉素GA_(4+7)(X_(3))、切根(X_(4))、氮肥(X_(5))、磷肥(X_(6))、钾肥(X_(7))及其组合对柏木结实性状的影响。【结果】①相关性分析结果表明,GA_(3)、磷肥、GA_(4+7)、钾肥、氮肥、截冠、切根与柏木结实能力的相关性依次递减;②交互作用结果表明,截冠-磷肥,GA_(4+7)-钾肥,GA_(3)-钾肥的交互作用对柏木母树结实状况影响最为显著;③综合结果表明,当保留3轮主枝后其余全部截冠,施用GA_(3)60 mg/株,切根程度为2/3,施用氮、磷和钾肥分别为70、210和210 g/株时,柏木母树结实性状达最佳水平,此时标准枝结实数量达51.6个,比仅采取截冠措施提升了68.6%。【结论】科学经营管理能改善柏木母树的结实状况,且截冠配合其他措施的效果更好。
【Objective】This study aims to investigate the effects of forest management interventions,such as top pruning,on the fruiting status of Cupressus funebris,and to address the challenges associated with high fruiting positions and low seed yield in seed orchards,thereby enhancing the production potential of improved varieties.Additionally,the study intends to offer insights for optimizing top pruning management in seed orchards.【Method】This study was conducted on a 30-year-old C.funebris mother tree orchards located at the Jingu National C.funebris Seed Base in Santai County,Sichuan Province.This study employed a mix-uniform design to examine the effects of various treatments,including top pruning(X1),gibberellin GA_(3)(X2),gibberellin GA_(4+7)(X_(3)),root cutting(X_(4)),nitrogen fertilizer(X_(5)),phosphorus fertilizer(X6),potassium fertilizer(X_(7)),as well as their combinations on fruiting traits of C.fun⁃ebris.【Result】①Correlation analysis revealed a sequential decline in the correlation between the fruiting ability of C.funebris and the following treatments:gibberellin GA_(3),phosphorus fertilizer,gibberellin GA_(4+7),potassium fertilizer,nitrogen fertilizer,top pruning,and root cutting.②The interaction results showed that top pruning-phosphorus fertilizer,GA_(4+7)-potassium fertilizer and GA_(3)-potassium fertilizer had the most significant effect on the fruiting status of C.funebris.③Comprehensive analysis showed that optimal fruiting traits were achieved when all remaining crowns were cut off after retaining the main branches for three rounds,with the application of GA_(3) of 60 mg/plant,a root cutting intensity of 2/3,and the application of nitrogen,phosphorus and potassium fertilizers at 70,210 and 210 g/plant,respectively.Under these conditions,the number of standard branches reached 51.6,representing a 68.6%increase compared to the treatment involving only top pruning.【Conclusion】The implementation of scientific management practices can improve the fruiting status of C.funebris,with the integration of top pruning and additional measures yielding superior outcomes.
作者
高梅
杨滨豪
邓若愚
孙岩
钟宇
GAO Mei;YANG Binhao;DENG Ruoyu;SUN Yan;ZHONG Yu(College of Forestry,Sichuan Agricultural University/Key Laboratory of Forest Resources Conservation and Ecological Security of the National Forestry and Grassland Administration in the Upper Reaches of the Yangtze River,Chengdu 611130,China;Sichuan Academy of Forestry,Chengdu 610081,China)
出处
《四川农业大学学报》
北大核心
2025年第1期176-183,共8页
Journal of Sichuan Agricultural University
基金
四川省科技计划重点研发项目(2021YFYZ0032)。
关键词
柏木
种子园
截冠
结实性状
Cupressus funebris
seed orchard
top pruning
fruiting character
