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摘要: 采用主成分分析和平均值标准差法，对宁夏枸杞Lycium barbarum 1年生硬枝扦插苗分级标准进行初步探讨，提出以地径和侧根数为分级质量指标。结果为：Ⅰ级苗，地径8.0 mm，侧根数11条；Ⅱ级苗，地径4.5 ～ 8.0 mm，侧根数在3 ~ 11条；Ⅲ级苗，地径4.5 mm，侧根数3条。通过对不同质量苗木定植初期生长指标定期调查，Ⅰ级苗和Ⅱ级苗在定植2个月后成活率均在95.0%以上，而Ⅲ级苗低于90.0%；Ⅰ级苗一次枝长度、生长速率和二次枝数量比Ⅲ级苗提高了17.8%，25.6%和187.5%；Ⅱ级苗比Ⅲ级苗提高了6.5%，4.9%和25.0%；且Ⅰ级苗二次枝数量极显著高于Ⅱ级苗和Ⅲ级苗。表5参11Abstract: In order to discuss standards for sorting and growth patterns of Lycium barbarum seedlings，the standard for grading Lycium barbarum seedlings was studied using a principal component analysis and the mean standard deviation. Categories of basal diameter and quantity of side roots were determined as possible quality indexes for seedling grading. Using the survival rate，branch length，branch growth rate and number of secondary branches of growth targets of different seedling grades was also established. Results showed that for first-grade seedlings（Ⅰ），basal diameter was 8.0 mm with 11 side roots；second-grade seedlings （Ⅱ） had a basal diameter of 4.5 - 8.0 mm and 3 － 11 side roots；while third-grade seedlings（Ⅲ） had a basal diameter 4.5 mm and 3 side roots. After two months of planting out，the survival rates of I and Ⅱ were ＞ 95.0%. Compared to Ⅲ，increases for Ⅰwere：branch length （17.8%），branch growth rate（25.6%），and the number of secondary branches for Ⅰ（187.5%）；whereas increases for Ⅱ compared to Ⅲ were：6.5%（branch length），4.9% （branch growth rate），and 25.0% （number of secondary branches for I）. Also，the number of secondary branches of Ⅰwere significantly higher （P0.01） than Ⅱ and Ⅲ.［Ch，5 tab. 11 ref.］
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Key words:
- silviculture /
- Lycium barbarum /
- planting stock /
- seedling sorting /
- growth percentage
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2011.03.016
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