International Journal of Agricultural Policy and Research
Vol.5 (6), pp. 117-124, June 2017
Available online at https://www.journalissues.org/IJAPR/
Article 17/ID/JPR019/08/ pages
Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License.
Original Research Article
valuation of diversity and abundance of pollinating insects on oilseed rape in major planting area of China
Yuan Guo1#,Xufeng Zhang1#, Youquan Shao1 and Jianke Li2*
1The Horticultural Institute, Shanxi Academy of Agricultural Sciences, Taiyuan Shanxi 030031, China.
2Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China.
*Corresponding Author Email: apislijk(at)126.com
#contributed equally to this work.
Oilseed rape is the second largest oil crop that sustains the human consumption of edible oil. Insect available on this plant could be an indicator that reflects the diversity and abundance in an area. We compared the differences of the diversity and abundance of pollinating insects between mountains, which retain the similar landscape as four decades ago, and plains in eight major planting regions of oilseed rape in China. The diversity index in mountains was 2.7492±0.25, which was significantly higher than 1.8325±0.27 in plains (P<0.05). The dominant concentration index in mountains was 0.1359±0.06, which was significantly lower than 0.3176±0.09 in plains (P<0.05), and the evenness in mountains was 0.8390±0.07, which was significantly higher than 0.6623±0.10 (P<0.05). These observations suggest that insect species were more abundant in mountain than those in plain region, of which hymenopteran and hoverflies were the dominant pollinators of oilseed rape. The decline of diversity and abundance of pollinators in plain areas might be due to the consequences of the large-scale monoculture model, machinery farming and extensive usage of pesticides.
Key words: Oilseed rape, diversity, abundance, pollinators