| Impact of climate warming on crop in Tianshui city——An example based oo winter rape |
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| DOI：10.7606/j.issn.1000-7601.2012.06.44 |
| Key Words: climatic warming winter rape impact Tianshui city |
| Author Name | Affiliation | | ZHAO Guoliang | The lnsitute of Agriculture Sciences of Tianshui, Tianshui, Gansu 741000, China | | GAO Qiang | The lnsitute of Agriculture Sciences of Tianshui, Tianshui, Gansu 741000, China | | YAO Xiaoying | The Tuanshui Meteorological Bureau Tianshui, Gansu 741000, China | | WEN Hongchang | The lnsitute of Agriculture Sciences of Tianshui, Tianshui, Gansu 741000, China | | QIANG Yuzhu | The Tuanshui Meteorological Bureau Tianshui, Gansu 741000, China | | WANG Juan | The lnsitute of Agriculture Sciences of Tianshui, Tianshui, Gansu 741000, China |
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| Abstract: |
| Using the temperature change data of Tianshui in 1968—2009 years the temperature variation trend and characteristics of Tianshui in recent years were analyzed. Combined with the growth period data grom the Institute of A-gricultural Sciences of Tianshui in 1980-2010 years, the relation of rapeseed growth period and temperature and its vari-ation trend were analyzed. And then the regression model was set up to reveal rape response to climate warming and to provide a theoretical basis for planting structure adjustment and food security. The results showed that the winter rape rowing and seeding trended to postponed, whereas the emergence of bud, producing shoots, first stage of flowering, middle stage of flowering and maturity trended in advance with the passage of time. Number of days between various growth periods of winter mpe trended to shorten and the mature time got earlier by 10.1 d/10a. The growth period of sowing-seeding, producing shoots-first stage of flowering, frst stage of flowering-middle stage of flowering trended to prolong, and the growth period of seeding-emergence of bud, emergence of bud-produeing shoots and middle stage of flowering-maturity all trended to shorten. 1000-grain weight of rape in 1980-2010 years trended to increase with the equation y=0.0135x+2.5825,R2=0.0941. The whole growth period of rape was signifieantly negatively correlated with the 5, 10, 15 cm and 20 cm average ground temperature. |
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