Soil Fertility Effect of Fertilization on Field Irrigated by Potato Starch Wastewater

doi:10.11924/j.issn.1000-6850.casb18070029

Abstract

Abstract: To solve the technical problems of fertilization on field with potato starch wastewater irrigation in southern mountainous region of Ningxia, taking farmland irrigated with potato processing starch wastewater for three years as the object and silage corn as the experimental crop, we explored the effects of different fertilization treatments on soil fertility and crop yield. The results indicated that: compared with the control (no fertilizer), there was no significant difference of silage corn yield under the application of chemical fertilizers, bio-organic fertilizers or combined application of chemical and bio-organic fertilizers; the application of bioorganic fertilizer could increase the content of soil organic matter and available potassium in 0- 20 cm, approximately doubled the content of available phosphorus in 20- 40 cm soil, and increased the alkalihydrolyzale nitrogen and total phosphorus accumulation in 0- 60 cm soil, and formed available potassium enrichment zone in 40-60 cm soil; the total nitrogen content in 0-60 cm soil significantly increased under the treatment of chemical fertilizer reduction by 30% combined bio-organic fertilizer (30% HF+WF), however, there was no significant difference of total potassium content in 0- 60 cm. Therefore, crop yield could be guaranteed under no fertilizer when silage corns are planted in farmland irrigated with potato processing starch wastewater for three years, but the improvement effects of soil fertility and yield could be better by applying suitable bio-organic fertilizer.

CLC Number:

S158.3

何进勤,雷金银,赵营,桂林国 and . Soil Fertility Effect of Fertilization on Field Irrigated by Potato Starch Wastewater[J]. Chinese Agricultural Science Bulletin, 2018, 34(36): 18-24.

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