| Effect of grain filling time on yield and quality of winter rapeseed（Brassica rapa L.）in north China |
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| DOI：10.7606/j.issn.1000-7601.2016.06.02 |
| Key Words: Brassica rapa L. winter rapeseed grain filling time yield quality traits |
| Author Name | Affiliation | | LEI Jian-ming | Tianshui Institute of Agriculture, Tianshui, 741000, China | | Liu Hai-qing | Rapeseed Engineering Research Center of Gansu Province, Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement of Gansu Province, Lanzhou,730070, China | | ZHANG Ya-hong | Tianshui Institute of Agriculture, Tianshui, 741000, China | | ZHANG Yan | Tianshui Institute of Agriculture, Tianshui, 741000, China | | SUN Wan-cang | Rapeseed Engineering Research Center of Gansu Province, Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement of Gansu Province, Lanzhou,730070, China |
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| Abstract: |
| The experiment was conducted to study the yield and quality of winter rapeseed (Brassica rapa L.) during filling maturity in north China to better guide harvest timely, and to improve the yield and quality. Analysis of plant morphogenesis alterations, plant dry and fresh weight, pods and seeds, yield and quality of winter rapeseed after final flowering 10, 20, 30, 40 d, and 45 d involved in Longyou 12 and 09 jian 8. The results showed that the color of pods and plants was bottle green, dark green, laurel green, kelly green and skin white, respectively, along with the filling maturity. The shape of seeds is characterized with the small-big-small tendency, and the color exhibits green-brown-green-brown-purple-black changes successively. Plant, pods and seed fresh weight, showing a single peak curve like a parabola that first increased and then decreased, reached the maximum 20, 30, 40 d after flowering, respectively, and the plant, pod, grain dry weight increased and then were kept constant. Seed weight, seed yield and economical coefficient exhibited S type rise curve with the peak at 30 d after flowering. The seed fresh weight, the weight of 1 000 seeds, and economical coefficient showed significant positive correlation with grain filling time, and theircorrelation coefficient was 0.991, 0.962, 0.968, respectively. grain filling time also had a significant (Ｐ<0.05) positive correlations with individual plant yield and oil content, and the correlation coefficient was 0.947and 0.940, respectively. And it had a significant (Ｐ<0.05) negative correlations with protein leveland the correlation coefficient was -0.886. The rank was 40 d>45 d>30 d>20 d>10 d by integrated evaluation of the main components. So, the grain filling time had a significant effect on the yield and quality of winter rapeseed, and the sallow period about after final flowering 40 d is the most suitable period to harvest when the yield and quality are best. |
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