• ISSN 1008-505X
  • CN 11-3996/S
TANG Ji-wei, XU Jiu-kai, WEN Yan-chen, TIAN Chang-yu, LIN Zhi-an, ZHAO Bing-qiang. Effects of organic fertilizer and inorganic fertilizer on the wheat yields and soil nutrients under long-term fertilization[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(11): 1827-1834. DOI: 10.11674/zwyf.18436
Citation: TANG Ji-wei, XU Jiu-kai, WEN Yan-chen, TIAN Chang-yu, LIN Zhi-an, ZHAO Bing-qiang. Effects of organic fertilizer and inorganic fertilizer on the wheat yields and soil nutrients under long-term fertilization[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(11): 1827-1834. DOI: 10.11674/zwyf.18436

Effects of organic fertilizer and inorganic fertilizer on the wheat yields and soil nutrients under long-term fertilization

  • Objectives The effects of chemical fertilizer and organic fertilizer on the wheat yields and soil nutrients under the condition of equal NPK nutrient input, were investigated to determine the optimum application amount of each fertilizer. This result could provide a basis for the scientific fertilization of wheat and the improvement of soil fertility.
    Method The experiment was started in 2006 with organic manure and chemical fertilizer applied with five nitrogen rates (0, 120, 240, 360, 600 kg/hm2), respectively. Therefore, there were nine fertilization treatments in total. During the eight-year field experiment, the crop yields and soil nutrients were measured after wheat harvested.
    Results The contents of soil organic matter, total N, available P and readily available K increased with organic fertilizer application increment and application years. For chemical fertilizer, the contents of organic matter, total N, available P and readily available K increased slowly, and there was no significant difference among treatments and among cultivation years. In the first few years, the increase of chemical fertilizer input could slowly increase the content of the soil available P and readily available K, and then they remained at a stable level. Under the same N level, the nutrient content of soil treated with organic fertilizer was significantly higher than that treated with chemical fertilizer. In treatments of organic fertilizers, the treatments of N 240, 360, and 600 kg/hm2 obtained significantly higher wheat yields than N 120 kg/hm2 treatment did, and no significant difference was observed among the three treatments. In treatments of inorganic fertilizers, there was no significant difference in yields among them. Under equal N application rate, no significant difference was observed between the organic and inorganic fertilizer treatments, except for N rate of 120 kg/hm2, in which the wheat yield in inorganic treatment was significantly higher than that in organic one.
    Conclusions Soil nutrients show increase trend with the increase of organic fertilizer input, while they stay stable with the increase of inorganic fertilizer input. Organic fertilizer performs better than inorganic fertilizer in increasing soil nutrient levels. Both organic and chemical fertilizers have significantly increased wheat yield. When the N input level is less than 120 kg/hm2, inorganic fertilizer could obtain higher yield, when the N input levels are higher than 240 kg/hm2, inorganic and organic fertilizer have similar yields, and wheat yield would not increase when excess N is applied.
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