Abstract：To investigate the appropriate combination of water and nitrogen for the potatoes, two irrigation levels(W1 and W2)and four nitrogen application rates F1(45 kg/hm2), F2(56.6 kg/hm2), F3(70 kg/hm2)and F4(86.6 kg/hm2)were conducted to evaluate the effects of combinations of water and nitrogen on water consumption, yield and quality of potatoes under center-pivot irrigation system at Keshan County, Heilongjiang Province. For assessing the effects of frequency of nitrogen application on the growth, yield and quality of potato, two frequencies of nitrogen application were also compared(C1:the nitrogen topdressing was applied once in the tuber enlargement stage; C2:the nitrogen topdressing was applied twice in the tuber enlargement stage). This study designed rainfall-fed zone as control. The results show that the total water consumption of the potato is ranged from 313 to 332 mm during the growing season. The tuber enlargement obtains the highest stage water consumption, which accounts for 63.4%-66.0% of the total water consumption. The seedling stage and the tuber formation stage are the critical periods for the potato water requirement, which indicates that the appropriate irrigation should be supplemented according to the local rainfall. The treatment of W2F4C2 obtains the highest yield, reaching 46 525 kg/hm2. No significant differences exists in starch, vitamin C, crude protein content and commodity rate of potatoes among the different treatments. The crude protein content of potatoes decreases first and then increases with the increment of nitrogen application rates. Therefore, the irrigation amount of 100 mm, nitrogen application rate of 86.6 kg/hm2 and nitrogen topdressing applied twice in the tuber enlargement stage are recommended for potato producers in semihumid areas of Heilongjiang province.
臧文静, 李晶晶, 裴沙沙, 黎耀军, 严海军*. 不同喷灌水氮组合对马铃薯耗水、产量和品质的影响[J]. 排灌机械工程学报, 2018, 36(8): 773-778.
ZANG Wenjing, LI Jingjing, PEI Shasha, LI Yaojun, YAN Haijun*. Effects of different water-nitrogen combinations on potato water consumption, yield and quality under sprinkler irrigation. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(8): 773-778.
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