| 史丽萍,郭建斌,牛俊义,陈永军,严明春.不同密度条件下旱地胡麻灌浆特性研究[J].干旱地区农业研究,2015,33(1):176~181 |
| 不同密度条件下旱地胡麻灌浆特性研究 |
| Grain filling characteristics of oil flax under different planting densities in arid land |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.029 |
| 中文关键词: 胡麻 种植密度 灌浆速率 Logistic模型 产量 |
| 英文关键词:oil flax plant density grain filling rate logistic model yield |
| 基金项目:国家胡麻产业技术体系定西综合试验站（CARS-17-SYZ-3） |
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| 中文摘要: |
| 在定西干旱生态条件下，以陇亚10号胡麻为材料，研究了密度对籽粒灌浆特性和农艺性状的影响。结果表明：随着种植密度的增大，胡麻分枝数、蒴果数减小，株高波动性变化；胡麻籽粒干物质积累过程呈“S”型曲线，可用Logistic模型进行模拟，相关系数达0.99以上，花后6～31 d籽粒干物质积累速度最大； 胡麻最大灌浆速率、平均灌浆速率和灌浆持续期均受种植密度的影响，处理间平均灌浆速率差异明显，其中以600 万株·hm-2的平均灌浆速率最高，1 050 万株·hm-2的平均灌浆速率最低；不同密度处理间百粒重和产量存在显著性差异，600 万株·hm-2处理的百粒重和籽粒产量最大，显著高于1 200 万株·hm-2处理。说明在实际生产中要根据不同胡麻品种类型选择最佳的种植密度。 |
| 英文摘要: |
| The effect of grain filling characteristics, the relationships between density and agronomic traits under different planting densities were investigated in Dingxi arid ecological conditions for Longya 10. The result showed that the branch number, capsule number were reduced, while the plant height varied with plant density. The dynamics of dry matter accumulation showed “S” curve of flax grain, and may be described by Logistic model. The correlation coefficient was more than 0.99. The increase of grain quality was largest after flowering 6～31 d. The maximum grain filling rate, mean grain filling rate and grain filling duration time were affected by plant density. The average filling rates among different treatments were significant. The filling rate of D3 (6 million·hm-2) treatment was the highest, while the D6 (10.5million.hm-2) treatment was lowest. The 100-grain weight and grain yield were significantly different under different density treatments. The 100-grain weight and grain yield of D3 (6 million·hm-2) treatment were maximum compared to other treatments, indicating the necessity of adopting suitable planting density for a given variety of flax. |
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