| Analysis of adaptility of Brassica rapa winter rape cultivars in cold and dry regions of North China |
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| DOI：10.7606/j.issn.1000-7601.2012.06.03 |
| Key Words: winter rape winter survival rate growth period productivity stability cold and dry regions of North China |
| Author Name | Affiliation | | CHEN Jiaorong | Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Lanzhou 730070, China | | SUN Wancang | Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Lanzhou 730070, China | | FANG Yan | Research and Testing Center of Gansu Agricultural University, Lanuhou 730070, China | | ZENG Xiucun | Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Lanzhou 730070, China | | WU Junyan | Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Lanzhou 730070, China | | LI Xuecai | Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Lanzhou 730070, China | | HE Li | Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Lanzhou 730070, China | | ZHAO Caixia | Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Lanzhou 730070, China | | SHI Penghui | Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Lanzhou 730070, China |
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| Abstract: |
| The regional trials were conducted to compare the winter survival rate, the growth period and yield of Brassica rapa winter rape cultivars in order to analyse their adaptility. The results showed that Longyou 6 and Longyou 7 had the highest winter survival rates, being 86.40% and 85.53% respectively, which were significantly higher than CK (Tianyou2), while the winter survival rates of Tianyou 5, Tianyou 7 and Tianyou 8 were all lower than CK. The growth period of the same winter rape cultivar varied mueh in different sites. For example, the growth period of Longyou 6 was 300 days in Qinwangchuan, but it was only 251 d in Khotan and was 49 d earlier than that in Qinwangchuan. The growth priods of different winter rape cultivars had large difference. For example, the growth periods of Longyou 6 and Longyou 7 were 300d in Qinwangchuan, while that of Longyou 8 was 285 d there. The others were 290 days, with 10d earlier than that of Longyou 6. The agronomic traits and average yield also varied greatly in different sites. In conclusion, the strain productivity and stability of Longyou 8, Longyou 7 and Longyou 6 were the best, followed by Longyou 9. The suitability of winter rape cultivars in different ecological regions was also different. Longyou 6 and longyou 7 were the most suitable cultivars in Beijing and its surrounding areas, west Xinjiang and north-central Gansu, Hexi corridor and Jingbian sur-rounding areas in Shaanxi. The Longyou 8 and Longyou 9 were the most suitable cultivars in south Xinjiang, and Tianyou 2, Tianyou 5 and Tianyou 8 were also suitable in this region. |
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