| 应用曲线模型解析施肥对白桦苗期年高生长节律的影响 |
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| 引用本文： | 宋淑媛,顾宸瑞,李春旭,王楚,刘桂丰.应用曲线模型解析施肥对白桦苗期年高生长节律的影响[J].东北林业大学学报,2021,49(4):17-23. |
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| 作者姓名： | 宋淑媛 顾宸瑞 李春旭 王楚 刘桂丰 |
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| 作者单位： | 林木遗传育种国家重点实验室(东北林业大学),哈尔滨,150040 |
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| 基金项目： | 国家级大学生创新创业训练计划(201810225123);国家重点研发计划(2017YED0600603)。 |
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| 摘 要： | 为了解析施肥对白桦苗期年高生长节律的影响,以30个白桦无性系1年生盆栽苗木为试验材料,利用前期筛选的施肥配方对其分别进行间隔7、14、21 d/次的施肥处理,以不施肥处理为对照。自5月1日至9月29日,每隔15~18 d进行1次苗高调查。针对调查的所有苗高数据进行方差分析和多重比较,利用方程分别对不同施肥处理下各无性系的苗高生长曲线模型进行拟合,Logistic根据曲线模型预测的速生期各参数变化规律,分析施肥促进白桦高生长的机制。结果表明:各施肥处理之间、各无性系之间均存在极显著差异(P<0.01),施肥处理与无性系之间的交互作用显著(P<0.05);各处理下白桦无性系苗高生长均符合"S"形曲线模型,各处理下及各无性系的Logistic方程拟合系数均高于0.97。由施肥与对照处理下苗高生长模型参数比较可知,施肥显著促进白桦高生长的机制是延长了速生期的生长时间,增加了速生点处生长速度,提高了速生期苗高的生长量及日生长量。3种处理中以处理1效果最好,其苗高实测值较对照提高了62.89%;各无性系对施肥的响应存在差异,有的无性系喜肥、有的耐瘠薄,而无性系W11、W5的适应性较强,在各种肥力条件下均生长较好。
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| 关 键 词： | 白桦 施肥 高生长模型 模型参数 |
Fertilization Effect on Annual Growth Rhythm of Betula platyphylla Using Logistic Growth Model |
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| Song Shuyuan,Gu Chenrui,Li Chunxu,Wang Chu,Liu Guifeng.Fertilization Effect on Annual Growth Rhythm of Betula platyphylla Using Logistic Growth Model[J].Journal of Northeast Forestry University,2021,49(4):17-23. |
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| Authors: | Song Shuyuan Gu Chenrui Li Chunxu Wang Chu Liu Guifeng |
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| Institution: | (State Key Laboratory of Tree Genetics and Breeding,Northeast Forestry University,Harbin 150040,P.R.China) |
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| Abstract: | This experiment was conducted to analyze the effect of fertilization on the annual growthrhythm of 30 clones of Betula platyphylla. Pre-screened fertilization formula was applied in every 7, 14 and 21 d during growth season. No fertilization was used as control. Tree height was measured in every 15-18 d from May 1 st to September 29 th. Analyses of variance were carried out for testing significant effect of clone and fertilization treatments on height growth. Logistic equation was applied to fit the height increment of each clone. Parameters in the fast-growing period were predicted by logistic growth model. Height of each clone response to fertilization was analyzed. There were significant effects on fertilization(P<0.01) and clone(P<0.01) and the interaction between fertilization treatment and clone(P<0.05). Height growth of clone under each treatment confirmed to the "S" curve of the logistic model. The fitting coefficients of each treatment and clone were higher than 0.97. The mechanism of fertilization promoted the total height growth was mainly due to extending fast growth period, enhancing growth rate, especially at the fast-growing point. The best treatment was treatment 1 which was able to increase height growth by 62.89%. In general, although most clones responded to fertilization treatments differently, clone W11 and W5 showed a strong adaptability due to consistent growth under various fertility conditions. |
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| Keywords: | Betula platyphylla Fertilization Height growth model Model parameter |
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