ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (6): 118-125. doi: 10.7668/hbnxb.201751736

Special Issue: Potato crops Soil fertilizer

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Effects of Different Water and Nitrogen Treatments on Potato Yield, Quality and Soil Nitrate Nitrogen Transport under Drip Irrigation

SHANG Meixin, FANG Zengguo, LIANG Bin, WANG Meng, LI Junliang   

  1. College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China
  • Received:2019-08-10 Published:2019-12-28

Abstract: In order to investigate the effects of different water and nitrogen treatments on potato tuber yield, quality and soil nitrate nitrogen transport in drip irrigation under plastic mulch, a two-factor and three-level complete randomized block design was adopted. Three irrigation treatments(450, 900, 1 350 m3/ha) and three nitrogen treatments(150, 225, 300 kg/ha) were set up respectively, and nine combinations of water and nitrogen were obtained. The yield, commodity, vitamin C, starch, soluble protein, soluble sugar and nitrate content of potato at harvest time, and the nitrate content at different growth stages and in soil layers were measured. The results showed that the yield and commodity rate of potatoes showed a parabolic trend with the increase of nitrogen application and irrigation amount, and reached the maximum of 35 299.9 kg/ha and 77.9%, respectively, at 225 kg/ha N and 900 m3/ha water. Under the same irrigation amount, with the increase of nitrogen application amount, Vc, nitrate content and tuber nitrogen uptake increased significantly. Under the same nitrogen application amount, nitrate content and partial productivity of nitrogen fertilizer decreased significantly with the increase of irrigation amount. At the same time, soluble protein, tuber nitrogen uptake and nitrogen harvest index showed a parabolic trend, and there were significant differences among irrigation treatments. Nitrate nitrogen content in surface soil (0-20 cm) was the highest at all growth stages, and decreased in the 0-100 cm profile. The seedling stage and tuber formation stage of potatoes were the main periods for NO-3-N migration to the lower soil layer. Therefore, the nitrogen application rate for potato planting in drip irrigation with film mulching under facilities should be controlled at 225 kg/ha, 900 m3/ha.

Key words: Potato, Drip irrigation, Yield, Quality, Nitrate nitrogen transport

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Cite this article

SHANG Meixin, FANG Zengguo, LIANG Bin, WANG Meng, LI Junliang. Effects of Different Water and Nitrogen Treatments on Potato Yield, Quality and Soil Nitrate Nitrogen Transport under Drip Irrigation[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(6): 118-125. doi: 10.7668/hbnxb.201751736.

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