| 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 |
| Key Words: oil flax plant density grain filling rate logistic model yield |
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| Abstract: |
| 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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