| 摘要: |
| “挂丝红”(早熟品种)播种至花序分化需要的有效积温少,营养生长期短,花序分化时叶数少,产品器官中花茎占的比例大,干物质平均增长率(CGR)高,最适叶面积指数大,产品器官干物质分配率的平均增长率高;“白甲”(晚熟品种)与之相反;“二青皮”(中熟品种)介于二者之间。这三个不同生态型品种播种至花序分化的天数与日平均温度间均有极显著的负相关关系。用日平均气温预测莴笋花序分化期比用5℃上有效积温有更广泛的实用价值。 |
| 关键词: 莴笋,品种,产量形成,花序分化 |
| DOI： |
| 分类号: |
| 基金项目: |
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| STUDIES OF THE CHARACTERISTICS OF YIELD FORMATION OF ASPARAGUS LETTUCE CULTIVARS |
|
Lu Guoyi
|
| Abstract: |
| In “Guasihong” (early cv.),the effective accumtllated temperature
from sowing to inflorescence differentiation was lowest,the vegetative
period was shortest; the leaf numbers at the time of inflorescence differentiation were the least;the ratio of flower stalk in the edible part was largest;the crop growth rate (CGR) in dry matter was highest;the optimum
leaf area index was biggest; and the rate of mean increase of dry matter
distribution in edible part was fastest.But,the reverse was true for“Bai1ia (late cv.),while “Erqinpi(mid.cv.)was in the intermediate condition,
In all of these,three cultivars,a significant negetive correlation between the days from sowing to inflorescence differentiation and the mean daily
temperature was found.Using mean daily temperature to predict the date
of 1nflorescence differentiation of asparagus lettuce is more practical than
using accumulated termperature above 5℃. |
| Key words: asparagus lettuce,cultivari, yield forrnation, inflorescence differentiation |
