陕北黄土高原红枣种植区水热资源变化及未来趋势预测

doi:10.12118/j.issn.1000–6060.2021.01.08

Abstract

Abstract:

To reveal the change characteristics of water and heat resources in the jujube planting area of the Loess Plateau in northern Shaanxi and to provide a scientific basis for the local jujube industry to adapt to climate change, on the basis of the temperature and precipitation data from eight weather stations from 1971 to 2019 in the jujube cultivation area of the Loess Plateau in northern Shaanxi and the RCP4.5 and RCP8.5 emission scenario data from 2021 to 2050, the climatic characteristics of temperature and precipitation were analyzed using methods of linear trend estimates, the M-K test, and Morlet wavelet analysis. The results show that the annual average temperature and average temperature of the jujube growth season showed a significantly increasing trend from 1971 to 2019 and emerging abrupt changes in 1991 and 1993, respectively. The monthly average temperature showed an increasing trend. The annual average temperature and average temperature of the jujube growth season displayed a quasi-periodic of 44 a. The annual precipitation and precipitation during the jujube growth season also showed an insignificantly increasing trend and did not reveal abrupt changes and significant fluctuations over the period of 31 a. The annual average temperature and average temperature of the jujube growth season showed an increasing trend under the RCP4.5 and RCP8.5 emission scenarios from 2021 to 2050. The temperature had a change cycle of 31 a. The annual precipitation and precipitation of the jujube growth season showed a decreasing trend under the RCP4.5 emission scenario and an increasing trend under the RCP8.5 emission scenario. The precipitation did not reveal abrupt changes. The annual precipitation and precipitation during the jujube growth season had a change cycle of 23-31 a under the RCP4.5 emission scenario and had a change cycle of 7 a under the RCP8.5 emission scenario. With the increase of heat resources in the red jujube planting area in northern Shaanxi, the suitable planting area for jujube may expand northward. The phenological period of the red jujube will change. An elevated temperature is conducive to the safe overwintering of pests and diseases. Precipitation may show an increasing trend that can alleviate the drought problem, but increased precipitation in the mature period will also lead to an increased risk of the jujube fruit cracking. There is a need to fully tap the potential of climate resources, properly adjust the layout and scale of the jujube industry, and select jujube varieties with a strong resistance to fruit cracking to promote the sustainable and healthy development of the northern Shaanxi jujube industry.

Key words: future climate scenario, change trend, growth season, the Loess Plateau of the northern Shaanxi

ZHANG Weimin,WANG Jinghong,LIU Lu,ZHANG Yong. Change and trend prediction of water and heat resource of jujube planting zones in the hilly area of the Loess Plateau in the northern Shaanxi[J].Arid Land Geography, 2021, 44(1): 73-79.

Figures/Tables 4

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时段	平均温度 /℃	气候倾向率/ ℃·(10a)^-1	降水量 /mm	气候倾向率/ mm·(10a)^-1
全年	10.20	0.22^***	460.50	14.73
生长季	18.40	0.13^*	424.10	15.02
1月	-6.70	0.16	3.20	-0.07
2月	-2.30	0.49^**	5.40	-0.03
3月	4.80	0.56^***	11.90	-0.86
4月	12.70	0.34^**	22.50	1.60
5月	18.70	0.04	33.80	2.25
6月	22.90	0.10	54.30	-0.89
7月	24.50	0.16	111.00	7.17
8月	22.60	0.02	103.20	-1.04
9月	17.10	0.15	68.30	3.40
10月	10.40	0.10	30.90	2.39
11月	2.30	0.16	12.80	1.00
12月	-4.90	0.24	3.00	-0.55

Change and trend prediction of water and heat resource of jujube planting zones in the hilly area of the Loess Plateau in the northern Shaanxi

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