| Evaluation of adaptation degree of winter and spring wheat to climate change in Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2013.04.039 |
| Key Words: climate change adaptation degree wheat spatial analysis Loess Plateau |
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| Abstract: |
| Taking Loess Plateau as the study area, the model of adaptation degree of crops to climate change was built. With mathematical statistics and geological spatial analysis methods, the spatio-temporal variation characteristics of adaptation degree of winter and spring wheat to precipitation, temperature and light from 1960 to 2011 was analyzed, and the regional division of adaptation degree was conducted. The results indicated that the synthesized adaptation degree of winter wheat during the whole growth period was mid-high (76.2%) and tended to decrease; the adaptation degree of winter wheat was moderate during revival to jointing stage but mid-high in other stages. The synthesiz
ed adaptation degree of spring wheat during the whole growth period was mid-high (70.9%) and tended to increase; the adaptation degree of spring wheat was mid-high during filling to maturing stage but moderate during sowing to emergence stage. The regional synthesized adaptation degree tended to increase from northwest to southeast in Loess Plateau; it was highly correlated to precipitation ada
ptation degree, moderately correlated to temperature adaptation degree, but negatively correlated to light adaptation degree. The trend rate of synthesized adaptation degree tended to increase in the west, northwest and northeast parts, but tended to decrease in the south and southeast parts of Loess Plateau. The climate change was somewhat beneficial to the planting of spring wheat in the north p
art, but became more and more harmful to the planting of winter wheat in the south part. It is essential to strengthen the management of winter wheat during revival to jointing stage and spring wheat during sowing to emergence stage so as to improve their adaptability. |
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