基于玉米种植的生长育肥猪粪污农田承载力

doi:10.11843/j.issn.0366-6964.2020.05.016

Abstract

Abstract: The purpose of this study was to accurately evaluate the nutrient production of manure and the biological yield of corn under different fertilizer application rates based on the model of growing-finishing pigs and corn planting farmland, and to establish the manure carrying coefficient of corn planting farmland based on the use of manure. Eight 13-week-old Duroc×Landrace×Yorkshire growing-finishing pigs with similar parity and body weight ((33.2±3.5) kg) were used in the experiment. Digestion trials were conducted at 16 and 25 weeks old, respectively. The excretion of feces and urine and the production of nitrogen and phosphorus were measured. In the corn planting experiment,6 treatment groups were set up in the experimental field with normal production level. The control group was treated with chemical fertilizer, the negative control group treated with no fertilizer, the 4 experimental groups were treated with pig manure according to 100%, 130%, 160% of standard nitrogen requirement and 100% of standard phosphorus requirement of corn planting, respectively. The biomass production and nitrogen and phosphorus contents of corn plants were measured at the late milk-ripe stage and the full-ripe stage, respectively. The demand for nitrogen and phosphorus in corn planting were calculated and fitted with the production of nitrogen and phosphorus in manure of growing-finishing pigs, and the manure carrying parameter of growing-finishing pigs based on corn planting was calculated. According to the application rate of pig manure organic fertilizer in 130% nitrogen demand, if the corn was harvested at the late milk-ripe stage, the requirements of nitrogen and phosphorus for corn planting in one season were 122.1 and 53.0 kg·hm^-2, respectively. If the corn was harvested at the full-ripe stage, the requirements of nitrogen and phosphorus for corn planting in one season were 190.2 and 62.8 kg·hm^-2, respectively. The field stock capacity was calculated based on the application rate of pig manure in 130% nitrogen demand. And the manure carrying parameter of growing-finishing pigs was 61.1 and 95.2 pigs·hm^-2 based on nitrogen and 90.5 and 107.3 pigs·hm^-2 on the basis of phosphorus, which the corn were harvested at the late milk-ripe stage and full-ripe stage, respectively. The application of pig manure could also increase the biomass yield of corn, thus enhancing the amount of nitrogen and phosphorus. The results showed that the manure carrying parameters of growing-finishing pigs were 95.2 pigs·hm^-2 and 107.3 pigs·hm^-2 based on the nitrogen and phosphorus requirement of corn respectively.

Key words: growing-finishing pigs, manure, returning manure to the field, corn planting, stock capacity

CLC Number:

S851.2

DU Kun, JIAO Hongchao, WANG Xiaojuan, ZHAO Jingpeng, LIN Hai. The Stock Capacity in the Manure of Growing-finishing Pigs Based on Corn Planting[J]. Acta Veterinaria et Zootechnica Sinica, 2020, 51(5): 1049-1059.

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The Stock Capacity in the Manure of Growing-finishing Pigs Based on Corn Planting

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