| Effect of different covering on the overintering rate and yield of winter rapeseed(Brassica napus) in central Gansu |
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| DOI：10.7606/j.issn.1000-7601.2010.03.17 |
| Key Words: winter rapeseed(Brassica napus) covering overwintering rate yield |
| Author Name | Affiliation | | WU Junyan | College of Agronomy, Gansu Agricultural University, Lanzhou, Cansu 730070, China | | SUN Wancang | College of Agronomy, Gansu Agricultural University, Lanzhou, Cansu 730070, China | | YANG Jie | College of Agronomy, Gansu Agricultural University, Lanzhou, Cansu 730070, China | | WEI Wenhui | College of Agronomy, Gansu Agricultural University, Lanzhou, Cansu 730070, China | | GUO Xiujuan | College of Agronomy, Gansu Agricultural University, Lanzhou, Cansu 730070, China | | ZHANG Junjie | College of Agronomy, Gansu Agricultural University, Lanzhou, Cansu 730070, China | | ZHANC Pengfei | College of Agronomy, Gansu Agricultural University, Lanzhou, Cansu 730070, China |
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| Abstract: |
| The main object of this experiment was to analyze and evaluate the effect of different covering on the overwintering rate, growth period and yield of winter rapeseed(Brassica napus) in central Gansu. The results showed that the growth period of winter napeseed treated with covering was 2~ 11 days shorter compared to that of open field cultiva-tion, and the growth stages were subsequently shortened, too. The growth period was shortened by about 11 days by plas-tic film covering with the best effects , and was shortened by 2 and 5 days respectively by manure and soil covering treat-ments . Overwintering rates of winter rapeseed under plastic film, soil and manure covering were 95 . 45%, 81 .25 % and 80.77 % respectively, while that of open field cultivation was 66 .67 % . The covening had more effect than CK on over-wintering rate and agronomic characteristics. Covering could also increase the yield. Briefly, the yield in the treatments of plastic flm, soil and manure covering was 5 358.3 kg/hm2, 3 854.25 kg/hm2 and 3 704 .25 kg/hm2 , increasing re-spectively by 50.94%, 8.57 % and 4.34% compared to CK . Covering is also good for storing soil temperature. It could not only keep a better stand of seedlings but also was easy to operate. So plastic film and soil coverings are reliable ways for central Gansu winter rapeseed. |
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