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- W2362495165 abstract "A field experiment was carried out to investigate the effects of different nitrogen levels(N 0,90,180,270 and 360 kg/ha)on potato tuber yield,soil nitrate accumulation,nitrogen balance and nitrogen use efficiency in potato under plastic mulching with drip irrigation.The results show that the tuber yield of the N180 treatment is the highest,and the highest soil NO-3-N contents are observed at 0-20 cm soil layers of each treatment at the harvest stage of potato,and the soil NO-3-N contents are reduced with the increase of depth in soil profiles(0-120 cm).Soil NO-3-N accumulation of each treatment(0-40 cm) accounts for 47.75%-53.17% of total accumulation(0-120 cm).Soil NO-3-N accumulation and nitrogen apparent loss are positively correlated with the nitrogen application rates.Potato nitrogen uptakes,soil NO-3-N accumulation and nitrogen apparent loss accounts for 37.93%,45.99% and 16.08% of the total nitrogen input.Nitrogen absorption of potato tubers and nitrogen harvest index are increased with the increase of the nitrogen application rate.The highest N recover efficiency,N agronomic efficiency and N physioloyical efficiency are observed in the treatment of N90,about 67.97%,68.06 kg/kg and 154.92 kg/kg,respectively.The nitrogen application rates should be controlled by 90-180 kg/ha under plastic cover with drip irrigation in potato production areas of northern Yinshan mountains in Inner Mongolia." @default.
- W2362495165 created "2016-06-24" @default.
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- W2362495165 date "2012-01-01" @default.
- W2362495165 modified "2023-09-24" @default.
- W2362495165 title "Effects of nitrogen fertilization on potato tuber yield,N uptake and soil NO_3~--N accumulation under plastic mulching with drip irrigation" @default.
- W2362495165 hasPublicationYear "2012" @default.
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