ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (S1): 197-203. doi: 10.7668/hbnxb.20190310

Special Issue: Soil fertilizer

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

Environmental Threshold and Prevention of Soil Phosphorus Leaching in Greenhouse Soils

LIU Lei, WANG Ling, XU Wanqiang, ZHANG Guoyin, ZHAO Ouya, GAO Jing, LI Pin   

  1. Institute of Agricultural Resources and Environment, Hebei Academy of Agriculture and Forestry Sciences, Hebei Fertilizer Technology Innovation Center, Shijiazhuang 050051, China
  • Received:2019-05-06 Published:2019-12-28

Abstract: Greenhouse vegetable production plays an important role in increasing of China's agriculture efficiency and farmer's income. However, due to the relatively backward management level, the amount of nutrient input is far greater than the demand of crops. Excessive phosphorus (P) input can not only fail to improve the yield, but also lead to the migration of P into water bodies due to the accumulation of large amounts of P in soil, thus threatening the safety of water environment. A field experiment was conducted to study the environmental threshold of P and the risk and amount of P leaching in protected soils under different fertilizer magnitudes, methods, and irrigation patterns, and to evaluate the effects of different water and fertilizer managements on P leaching. The results showed that there were two change-points of Olsen-P and CaCl2-P in calcareous soil of northern greenhouse, which were 58.39,257.45 mg/kg, respectively. We recommended that 60 mg/kg be used as leaching threshold and 260 mg/kg soil Olsen-P be used as control threshold of P fertilizer input in this area at the present stage. Taking these thresholds as the evaluation standard, there was a high risk of P leaching in traditional water and fertilizer managements, with the annual P leaching of 4.91 kg/ha. Reducing P input by 25%, the P leaching loss could only be reduced by 18.11%, while combining with drip irrigation or integration of water and fertilizer, P leaching could be reduced by 34.47% to 44.07%;or adjusting the proportion of organic and inorganic P input to 3:1, P leaching could also be reduced by 39.66%, comparing with traditional managements.At last, we proposed the manure safe application technology based on P leaching threshold and control threshold of P fertilizer input of greenhouse soil, which is of great practical significance to achieve a win-win situation of vegetable production and environmental protection.

Key words: Greenhouse soils, P leaching, Environmental threshold, Prevention technology, Non-point source pollution

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Cite this article

LIU Lei, WANG Ling, XU Wanqiang, ZHANG Guoyin, ZHAO Ouya, GAO Jing, LI Pin. Environmental Threshold and Prevention of Soil Phosphorus Leaching in Greenhouse Soils[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 197-203. doi: 10.7668/hbnxb.20190310.

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