Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (30): 19-24.doi: 10.11924/j.issn.1000-6850.casb2020-0624

Previous Articles     Next Articles

Effects of Cow Faeces Biochar Fertilizer on Growth, Yield and Nitrogen Utilization of Highland Barley

Sun Quanping1,2(), Peng Jun1,2(), Suolang Cuomu1, Qin Jiwei1,2, Tan Haiyun1,2, Yang Sutao2, Pubu Guiji2   

  1. 1State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Lhasa 850000
    2Institute of Agricultural Resources and Environment, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850000
  • Received:2020-11-05 Revised:2021-04-13 Online:2021-10-25 Published:2021-12-08
  • Contact: Peng Jun E-mail:sunquanping5799@163.com;pj0891@163.com

Abstract:

To investigate the effects of biochar-based fertilizers with different proportions on growth, yield and nitrogen utilization of highland barley, we used cow dung as the research object, prepared biochar by pyrolysis and carbonization at high temperature (350-450℃) under oxygen limitation, and mixed biochar with a certain proportion of chemical fertilizer. The study shows that as the carbonization proceeds, the content of total nitrogen and organic matter (organic carbon) in cow dung are decreased, as well as the C/N ratio, but the content of total phosphorus and total potassium are increased. The application increase of cow dung biochar could raise the content of chlorophyll in the leaf of highland barley, promote the crop to utilize the nutrients in fertilizers, which is benefit to the growth of highland barley, the highest chlorophyll content in leaves is observed under the treatment of ash manure combined with chemical fertilizer. The grain yield of different treatments is significantly different. As the application amount of chemical fertilizer is reduced to 70% and the cow dung biochar is 30%, the grain yield is the highest of 4830.75 kg/hm2(13.88% higher than the control). The straw yield is the highest under the treatment of sheep manure of 22500 kg/hm2. Under the same nitrogen input condition, the nitrogen utilization efficiency can be improved by reducing chemical fertilizers and increasing cow dung biochar.

Key words: cow dung, biochar, highland barley, yield, nitrogen utilization

CLC Number: