Climate Suitability Evaluation of Winter Wheat in Semi-Arid Area of Loess Plateau: A Case Study of Tongwei County

doi:10.11924/j.issn.1000-6850.casb2023-0419

Abstract

Abstract:

Climate suitability can represent the degree of influence of climate conditions on crop growth and development. Based on the meteorological data and agricultural meteorological observation data of the last 40 years in Tongwei County in the semi-arid region of the Loess Plateau, and the fuzzy mathematical method, the climate suitability of winter wheat during the whole growth period in semi-arid rain-fed agricultural area of Loess Plateau was evaluated according to the requirements of temperature, moisture and light in each development period of winter wheat. The results showed that the temperature suitability of winter wheat during the whole growth period in Tongwei County was 0.58 in the past 40 years, and the temperature suitability of winter wheat during the overwintering period was the highest (0.95). The temperature suitability of three-leaf stage to overwintering stage was low (-0.42), and the inter-annual difference was small. The temperature suitability of winter wheat during the whole growth period increased at a rate of 0.019/10a. Water suitability was 0.46, the highest water suitability was 0.66 for filling stage to ripening, followed by 0.63 for re-greening to jointing, and the water suitability increased at a rate of 0.017/10a during the whole growth period. The light suitability was 0.62, the highest light suitability was 0.68 from overwintering stage and re-greening stage to jointing stage, and the lowest was 0.51 from filling stage to maturity stage. The light suitability increased by 0.011/10a in the whole growth stage. The comprehensive suitability was 0.54, the highest was 0.70 at the re-greening to jointing stage, and the lowest was -0.36 at the three-leaf to overwintering stage. The comprehensive suitability increased at the rate of 0.014/10a during the whole growth period. Yield was significantly correlated with temperature suitability from heading stage to milk maturity stage, water suitability from milk maturity stage to maturity stage and comprehensive suitability from filling stage to maturity stage. The climatic suitability can accurately reflect the change of meteorological conditions during the growing period of winter wheat in the semi-arid of the Loess Plateau.

Key words: semi-arid area of Loess Plateau, winter wheat, climate suitability, evaluation indicator

JIAO Run’an, LI Xuhua, QI Yue, LEI Jun, GOU Zhiwen, ZANG Yajun, XUE Xiao. Climate Suitability Evaluation of Winter Wheat in Semi-Arid Area of Loess Plateau: A Case Study of Tongwei County[J]. Chinese Agricultural Science Bulletin, 2024, 40(17): 73-80.

Figures/Tables 6

References 23

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生长期	光照适宜度	温度适宜度	水分适宜度	综合适宜度
播种期—三叶期	0.249	0.005	-0.183	0.005
三叶期—停止生长	-0.010	0.093	0.038	0.079
停止生长—返青期	0.086	-0.241	0.135	0.142
返青期—拔节期	-0.126	-0.233	-0.107	-0.252
拔节期—抽穗期	-0.091	0.048	-0.063	-0.028
抽穗期—乳熟期	0.141	0.406*	-0.183	0.047
乳熟期—成熟期	0.041	0.075	0.378*	0.380*
全生育期	0.110	0.140	-0.01	0.102

生长期	光照适宜度	温度适宜度	水分适宜度	综合适宜度
播种期—三叶期	0.249	0.005	-0.183	0.005
三叶期—停止生长	-0.010	0.093	0.038	0.079
停止生长—返青期	0.086	-0.241	0.135	0.142
返青期—拔节期	-0.126	-0.233	-0.107	-0.252
拔节期—抽穗期	-0.091	0.048	-0.063	-0.028
抽穗期—乳熟期	0.141	0.406*	-0.183	0.047
乳熟期—成熟期	0.041	0.075	0.378*	0.380*
全生育期	0.110	0.140	-0.01	0.102