桃叶石楠一年生播种苗生长发育规律及育苗技术初探
江西师范大学, 生命科学学院, 江西南昌 330022
| 摘 要： | 本文对桃叶石楠（Photinia prunifolia）一年生苗木高和地径生长进行研究，介绍了桃叶石楠树种的形态特征、生物学特性及地理分布，并通过实生苗播种育苗试验，采用有序样本聚类分析法将桃叶石楠播种苗苗高生长过程进行分析。结果表明：通过试验调查将苗木生长分为出苗期、生长期、速生期和生长后期等四个不同的生长时期。桃叶石楠种子出苗期生长期为30 d。生长初期持续时间约48 d，苗木生长快速期持续120 d，比生长初期的苗高和地径生长分别增长了10.1倍和5.2倍；生长后期，经测量发现苗高、地径生长较为缓慢。对苗高生长与苗龄进行模拟，得模拟相关系数高达0.99，拟合度较高，表明苗桃叶石楠高木生长与苗龄之间的关系高度符合逻辑斯蒂增长模型，同时利用Logistic population growth生长曲线模型来拟合桃叶石楠的高和径生长，阐明桃叶石楠一年生苗生长规律。由于苗木在速生期生长量较大，即苗高增长速率随苗龄增加而快速生长，此阶段应补充足够的营养肥以满足苗木快速生长；一年生苗生物量占总生物量的62.5%，地上和地下生物量鲜重比为1.67，因此，具有较好的抗倒伏性，适合苗木造林，这些结论为合理培育和利用新的造林树种提供参考。 |
| 关 键 词： | 桃叶石楠; 播种育苗; 生长曲线方程 |
| DOI： | 10.57237/j.jaf.2023.01.005 |
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收稿日期: 2023-01-03
接受日期: 2023-04-03
在线出版日期: 2023-04-07
Growth and Development Law of Annual Sown Seedings of Photinia prunifolia and Preliminary Exploration on Seeding Breeding Technology
College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| Abstract: | In this paper, we studied the height and ground diameter growth of annual seedlings of Photinia prunifolia, and introduced its the morphological characteristic and geographical distribution. At the same time, through the seedling sowing and breeding experiment, we used the ordered sample clustering analysis method to analyze the high growth process of seedlings sown in Photinia prunifolia. We divided the growth of seedlings into four different growth periods, seedling stage, growth stage, rapid growth stage and later growth stage according to the experimental investigation. The seedling stage and growth stage of Photinia prunifolia were 30 days. The initial growth period lasted for about 48 days. The rapid growth stage lasted for 120 days, which was 10.1 times and 5.2 times higher than the seedling height and ground diameter growth in initial growth period, respectively. In later growth stage, the seedling height and ground diameter grew quite slowly. The simulation correlation coefficient was as high as 0.99 by simulating seedling height growth and seedling age. The fitting degree was high. It showed that the relationship seedling height growth and seedling age of Photinia prunifolia was highly consistent with the Logistic population growth model. Meanwhile, by using the Logistic population growth curve model to fit the high and diameter growth of Photinia prunifolia, we elucidated the growth law of annual seedlings. Since the seedlings grew in the rapid growth stage, that is, the high growth rate of seedlings grew rapidly with the increase of seedling age, enough nutrient fertilizer should be supplemented at this stage to satisfy the rapid growth of seedlings. Annal seedling biomass accounted for 62.5% of the total biomass, and the fresh-weight ratio of above-ground biomass was 1.67. Therefore, this species has better lodging resistance and is suitable for seedling afforestation. The study provided references for the rational cultivation and utilization of new afforestation tree species. |
| Keywords: | Photinia prunifolia; Sowing and Rearing Seedlings; Growth Curve Equation |
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