Principal component analysis method for suitable water and fertilizer doses of drip irrigation grape in an extreme arid area
HOU Yusheng1,2, WANG Zhenhua1,2*, LI Wenhao1,2, ZHANG Jifeng1,2, DOU Yunqing1,2, WEN Yue1,2
1. College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang, 832003, China; 2. Key Laboratory of Modern Water-saving Irrigation of Xinjiang Production & Construction Group, Shihezi University, Shihezi, Xinjiang, 832003, China
Abstract：In order to identify the appropriate water and fertilizer doses for drip irrigation grape in an extreme arid area, the optimal water and fertilizer doses with higher yield and better efficiency were evaluated comprehensively for a mature seedless white grape in a test field by using the principal component analysis method. In doing so, irrigation and fertilization two factors were selected with four levels 6 000(W1), 6 750(W2), 7 500(W3), 8 250 m3/hm2(W4)for irrigation dose, three levels 450(F1), 750(F2), 1 050 kg/hm2(F3)for fertilization dose. The results showed that effects of water and fertilizer interaction on yield, water and fertilizer utilization efficiency and quality of drip irrigation grape have statistical significance(P<0.01). The influence of irrigation and fertilizer doses on titratable acid is also with statistical significance(P<0.05). The influences on grape yield, water use efficiency, fertilizer partial productivity, soluble solids, and vitamin C are statistically signi-ficant(P<0.01). The maximum yield occurs in treatment W3F2, especially with a 29.76% increment compared with the minimum yield treatment. The highest soluble solid content is achieved in treatment W3F2. The richest titratable acid is reached in treatment W4F2, unfortunately, the difference from treatment W3F2 is not statistically significant(P>0.05). The vitamin C quantity per 100 g was 7.37-8.52 mg across diffe-rent water and fertilizer treatments, and the difference between treatment W3F2 and W4F3 is not statistically significant(P>0.05). The quality index is better in treatment W3F2. The results of principal component analysis showed that the best water and fertilizer treatment for the drip irrigation grape in the extreme arid area is W3F2 in which N, P2O5 and K2O are 300, 150 and 300 kg/hm2, respectively.
侯裕生,王振华*,李文昊,张继峯,窦允清,温越,. 极端干旱区滴灌葡萄水肥适宜用量主成分分析法[J]. 排灌机械工程学报, 2021, (1): 89-95.
HOU Yusheng,WANG Zhenhua*,LI Wenhao,ZHANG Jifeng,DOU Yunqing,WEN Yue,. Principal component analysis method for suitable water and fertilizer doses of drip irrigation grape in an extreme arid area. Journal of Drainage and Irrigation Machinery Engin, 2021, (1): 89-95.
