Effect of Intercropping in Apricot Orchard on the Crops Yield and Water Use Efficiency in Semi-arid Area

doi:10.3969/j.issn.1000-6362.2017.09.005

Abstract

Abstract: Investigation of the effects of the apricot intercropping system on crop yield and water use efficiency is widely accepted to be very important for putting forward the optimal intercropping model suitable for the semi-arid region of northeast China. The apricot intercropping system was used as a test objects, a field experiment was conducted from 2012 to 2013 on the wind and sand semi-arid area of northeast China. The designed seven treatments were apricot-peanut intercropping (IP), apricot-millet intercropping (IM), apricot-sweet potato intercropping (ISP), sole apricot (SA), sole peanut (SP), sole millet (SM) and sole sweet potato (SSP). The yield, water use efficiency, water equivalent ratio and soil moisture were recorded. The results showed that the average yield of peanut, millet and sweet potato in intercropping system was 65.09%, 55.28% and 64.68% lower than that of sole cropping, respectively. But there was no difference in the yield between apricot intercropping and sole cropping. The water equivalent ratio of the apricot intercropping was more than 1, showing a better water use advantage. Furthermore, the water equivalent ratio of apricot-millet intercropping was the highest, reaching 1.45, and 8.2% and 9.9% higher than that of apricot-peanut intercropping and apricot-sweet potato intercropping, respectively, while spatial distribution of soil moisture content convinced this water use advantage in apricot-millet intercropping. The comprehensive analysis showed that the apricot-millet intercropping is suitable for the local ecological environment, and it has a good application value in the development of rain-fed agriculture the semi-arid area of northeast China with heavy sand erosion due to windy climate.

Key words: Agro-forestry, Yield, Water use efficiency, Water equivalent ratio, Semi-arid area

BAI Wei, SUN Zhan-xiang, ZHENG Jia-ming, DU Gui-juan, CAI Qian, FENG Liang-shan, YANG Ning. Effect of Intercropping in Apricot Orchard on the Crops Yield and Water Use Efficiency in Semi-arid Area[J]. Chinese Journal of Agrometeorology, 2017, 38(09): 574-582.

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