| Effect of cold-resistant compounds on growth and yield of winter rapeseed(Brassica rapa L.) |
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| DOI：10.7606/j.issn.1000-7601.2017.04.40 |
| Key Words: Brassica rapa L. cold-resistant compound the growth and development cold resistance |
| Author Name | Affiliation | | GUO Ren-di | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LIU Hai-qing | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WU Jun-yan | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | SUN Wan-cang | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LIU Zi-gang | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZENG Xiu-cun | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | FANG Yuan | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHEN Qi | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Zhi-jiang | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YUAN Jin-hai | Key Laboratory of Crop Genetic Improvement and Germplasm Enhancement, Rapeseed Engineering Research Center of Gansu Province, Gansu Provincial Key Laboratory of Arid Land Crop Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| A field experiment was conducted on Longyou 6, Longyou 7 and Tianyou 2 and Tianyou 4, (Lonyou 6 and Longyou7 have super strong cold resistance; Tianyou 2 and Tianyou 4 have weak cold resistance) to identify the effects of cold-resistant compounds on the leaf relative electrical conductivity, MDA content, overwintering rates, agronomic traits，growth period，economic coefficient and yield change of winter rapeseed (Brassic rapa L.) at minus five degree. 6 types of treatments were designed: T1, distilled water（CK）; T2,20 mg·L-1 ABA; T3,20 mg·L-1 ABA+300 mg·L-1 PEG-6000; T4,20 mg·L-1 ABA+50 mg·L-1 PP333; T5,20 mg·L-1 ABA+300 mg·L-1 PEG-6000+50 mg·L-1 PP333; T6,20 mg·L-1 ABA+300 mg·L-1 PEG-6000+50 mg·L-1 PP333+10 g·L-1 urea. We found that the overwintering rates achieved 91.97% under T5, increased by 18.87%, compared with CK. After spraying cold-resistant compounds, compared with ck, the leaf relative conductivity and MDA content averagely decreased by 25.43% and 25.36% respectively, and root collar diameter, pods per plant, yield per plant, economic coefficient, and yield increased significantly, as well as growth period prolonged. In terms of cold-resistance effects, the treatments sequenced in the way of T5>T6>T4>T3>T2>CK, according to subordinate function analysis and the principal component scores. |
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