Effects of sowing density on growth, yield of potato under drip irrigation
WANG Yan1, LIU Chang1, LI Yunkai1, GU Tao2, SU Yanping1*
1. College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China; 2. China Irrigation and Drainage Development Center, Beijing 100054, China
Abstract：A field test was carried out to study effects of sowing density on potato yield, growth and water use efficiency under drip irrigation with cultivator in Heilongjiang province, China, and eventually identify the best sowing density for potato with high yield and good quality. The crop was grown with three sowing densities, namely 7.28(104 plants/hm2)(RS25), 6.67(104 plants/hm2)(RS35)and 5.55(104 plants/hm2)(CK). Results show that with increasing sowing density all the potato plant height, stem thickness, commodity potato rate and dry matter accumulation exhibit a decreasing tendency. The potato yield and water use efficiency rise with increasing density but start to decline at a density. As a result, RS35 leads to the highest yield and water use efficiency, such as 47325 kg/m3 and 12.05 kg/hm2, respectively. Regarding potato quality, the effect of sowing density on potato crude protein content is not statistically significant. The starch and Vc contents go down sharply with increase of the density, especially, both contents are decreased by 5.57% and 7.96%, respectively, in RS25, compared with CK; unfortunately, there is no statistically significant difference between them. Thus, sowing density 6.67×104 plants/hm2 in RS35 leads to higher yield, finer tuber quality and better water use efficiency, it is a more suitable sowing density in Heilongjiang province under drip irrigation.
王岩,刘畅,李云开,顾涛,苏艳平*. 种植密度对滴灌马铃薯生长、产量的影响[J]. 排灌机械工程学报, 2020, 38(1): 90-94.
WANG Yan,LIU Chang,LI Yunkai,GU Tao,SU Yanping*. Effects of sowing density on growth, yield of potato under drip irrigation. Journal of Drainage and Irrigation Machinery Engin, 2020, 38(1): 90-94.
