文献类型：期刊文献

中文题名：香榧初结果母枝性状变化规律与结实能力的关系

英文题名：Relationship between character changing and seed-bearing capacity of initial seed-bearing mother shoots in Torreya grandis‘Merrillii’

作者：叶淑媛[1,2] 曾燕如[1] 胡渊渊[1] 龙伟[2] 汪舍平[3] 喻卫武[1]

第一作者：叶淑媛

机构：[1]浙江农林大学省部共建亚热带森林培育国家重点实验室,浙江杭州311300;[2]中国林业科学研究院亚热带林业研究所,浙江杭州311400;[3]常山县林业水利局,浙江常山324200

年份：2022

卷号：39

期号：1

起止页码：41-49

中文期刊名：浙江农林大学学报

外文期刊名：Journal of Zhejiang A&F University

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：浙江省重点研发计划项目(2018C02004);中央财政林业科技推广示范项目(〔2018〕TS07号,〔2018〕TG17号);浙江农林大学省部共建亚热带森林培育国家重点实验室项目(ZY20180208)。

语种：中文

中文关键词：初结果林;香榧;结果母枝;坐果率;矿质元素

外文关键词：initial seed-bearing tree;Torreya grandis‘Merrillii’;seed-bearing mother shoot;seed-setting rate;mineral elements

分类号：S664.5

摘要：【目的】探究香榧Torreya grandis‘Merrillii’初结果林分树体结果母枝性状变化规律与结实能力的关系,为科学控梢、培养结果母枝及提高种实产量提供依据。【方法】以浙江省杭州市临安区锦源村香榧初结果林为研究对象,分析树势间和层面间的结果母枝性状、结果母枝粗度及长度区间分布、枝叶矿质元素质量分数与结果指标的关系。【结果】中庸树的结果母枝粗度最大,其结果母枝长度显著高于弱势树(P<0.05);不同树势树体的混合芽比例和坐果率差异显著(P<0.05),弱势树的混合芽比例和坐果率较高,强壮树的混合芽比例和坐果率较低;树冠上层的结果母枝粗度和长度最大,下层最小(P<0.05),混合芽比例和坐果率在不同冠层部位间差异显著(P<0.05),而且在不同树势的树体间表现不同,其中坐果率在中庸树和弱势树体的树冠下层最高;结果母枝粗度1.91~2.50 mm、长度5.51~8.70 cm的2代果总数和膨大果数量最多,且坐果率与结果母枝长度呈显著负相关(P<0.01)。此外,在枝叶矿质营养特征方面,不同树势树体枝叶的氮质量分数之间差异显著(P<0.05),6月中庸树势树体枝叶的氮质量分数最高;钙质量分数与结果母枝长度呈显著负相关,与坐果率呈显著正相关(P<0.05)。【结论】生产实践中,培养中庸树型,适当控制结果母枝长度和树体高度,有利于香榧坐果率、混合芽比例的提高;保留粗度1.91~3.10 mm、长度5.51~11.90 cm的结果母枝,对提高香榧坐果率、产量有重要意义;施钙肥,对促进香榧种子生长和提高坐果率有重要作用。图3表8参21。
[Objective]With an exploration of the relationship between the character changing patterns of seedbearing mother shoots and the seed-bearing capacity of initial seed bearers in Torreya grandis‘Merrillii’,this study is aimed to provide theoretical and technical rationale for the control of shooting,the culture of seedbearing mother shoots,and the promotion of seed yield.[Method]With the T.grandis‘Merrillii’trees located in Jinyuan village of Lin’an District,Hangzhou City of Zhejiang Province selected as the subjects,an analysis was conducted of the characteristics of seed-bearing mother shoots either among trees of various levels of vigor or among different layers of a crown,the distribution of seed-bearing mother shoots in terms of shoot length and thickness,and the relationship between the content of mineral elements in shoots and leaves and seed-bearing parameters.[Result]The seed-bearing mother shoots from moderately vigorous trees were the thickest and significantly longer than those from the trees of weak vigor(P<0.05).Trees of various levels of vigor were significantly different in the percentage of mixed buds and seed-setting rate(P<0.05),with the percentage of mixed buds and seed-setting rate of weak trees being higher than those of vigorous trees.The seed-bearing mother shoots in the upper layer of the crown were the thickest and longest while those in the lower layer of the crown were the thinnest and shortest(P<0.05).The proportion of mixed buds and seed-setting rate were significantly different among layers of the crown(P<0.05)and varied with the vigor of trees,with the seedsetting rate being the highest in the lower layer of the crown of the moderately vigorous and weak trees.The mother shoots with a thickness of 1.91-2.50 mm and a length of 5.51-8.70 cm took up the highest percentage in new seeds and swollen seeds while the seed-setting rate was significantly negatively correlated with the length of the mother shoot(P<0.01).In terms of mineral nutrition,the nitrogen content in the shoots and leaves was significantly different among trees of various levels of vigor(P<0.05),with the percentage of nitrogen in the shoots and leaves sampled in June from the trees of moderate vigor being the highest whereas the Ca content was significantly positively correlated with the length of mother shoots,but significantly negatively correlated with the seed-setting rate(P<0.05).[Conclusion]In the process of production,the cultivation of moderately growing trees with a proper control over the length of mother shoots and the tree height would be conducive to the increase in seed setting rate and mixed bud proportion.On the other hand,it is of great significance to retain the mother shoots with a thickness of 1.91-3.10 mm and a length of 5.51-11.90 cm to achieve the promotion of seed-setting rate and yield.Also,calcium fertilizer plays an important role in promoting seed growth and improving the seed-setting rate in T.grandis‘Merrillii’.[Ch,3 fig.8 tab.21 ref.]