Warming and Drought in Hailun of Heilongjiang: Effects on Growth and Development of Soybean

doi:10.11924/j.issn.1000-6850.casb2021-0788

Abstract

Abstract:

The purpose of this study is to explore the effects of different degrees of warming and drought stress on soybean growth in Hailun area of Heilongjiang Province by using WOFOST model, and to provide reference for local soybean planting. The soybean production data of Hailun Comprehensive Experimental Station were used as test materials, the localized WOFOST model was used to simulate the warming and drought stress, and the growth data of soybean under different stress conditions were measured. The results showed that under 1℃-3℃ warming stress, the growth period of soybean was significantly shortened, the leaf area index decreased with the increase of the stress, and the yield decreased with the increase of temperature. Under 3℃ temperature increase, the total weight of living storage organs (TWSO) decreased by 11.01% and the total aboveground production (TAGP) decreased by 13.72%. Under different degrees of drought stress, the length of soybean growth period did not change significantly, but the leaf area index decreased significantly, and the yield was significantly affected by drought, particularly, the total weight of living storage organs was decreased by 13.26% under severe drought stress. In this study, the impact of warming and drought on soybean in Hailun was analyzed by crop model, which could have great significance for disaster prevention and mitigation, and stable yield increase in soybean production.

Key words: WOFOST model, soybean, warming, drought, yield

CLC Number:

SUN Xipeng, LI Qi, QIAO Yunfa, HU Zhenghua, ZHANG Xuying, LIU Yuanyuan. Warming and Drought in Hailun of Heilongjiang: Effects on Growth and Development of Soybean[J]. Chinese Agricultural Science Bulletin, 2022, 38(15): 27-33.

Figures/Tables 12

References 26

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参数	含义	单位	取值
SMW	凋萎系数	%	20.3
SMFCF	田间持水量	%	31.4
SM0	饱和土壤含水量	%	38.5

参数	含义	单位	取值
SMW	凋萎系数	%	20.3
SMFCF	田间持水量	%	31.4
SM0	饱和土壤含水量	%	38.5

参数	定义	单位	取值
TDWI	初始干物质重	kg/hm²	120
TMUS2	开花到成熟时的积温	℃·d	1150
SLATB1	比叶面积	hm²/kg	0.014
SPAN	叶片在35℃时的生命周期	d	23
CVL	同化物转化成叶片干物质重效率	-	0.72
CVR	同化物转化成根干物质重效率	-	0.72
CVS	同化物转化成茎干物质重效率	-	0.69
Q10	温度变化10℃时呼吸速率的增加率	-	2
CVO	同化物转化成贮存器官效率	-	0.48

参数	定义	单位	取值
TDWI	初始干物质重	kg/hm²	120
TMUS2	开花到成熟时的积温	℃·d	1150
SLATB1	比叶面积	hm²/kg	0.014
SPAN	叶片在35℃时的生命周期	d	23
CVL	同化物转化成叶片干物质重效率	-	0.72
CVR	同化物转化成根干物质重效率	-	0.72
CVS	同化物转化成茎干物质重效率	-	0.69
Q10	温度变化10℃时呼吸速率的增加率	-	2
CVO	同化物转化成贮存器官效率	-	0.48

数值	结果
实测平均值/(kg/hm²)	2488.4
模拟平均值/(kg/hm²)	2477
MAE/(kg/hm²)	77
MRE/%	0.031
RMSE/(kg/hm²)	86.113
RRMSE/%	3.5