Effect of Biochar Addition on Soil Nitrogen Migration in Greenhouse Vegetable Field

doi:10.11924/j.issn.1000-6850.casb20191000782

Abstract

Abstract:

To explore the effect of biochar application on soil nitrogen transfer in greenhouse vegetable field, regular irrigation and fertilizer (WF), regular irrigation and fertilizer+ biochar (WFB), 80% irrigation and 80% fertilizer+ biochar (80%WFB) in black soil of greenhouse vegetable field were conducted and the effects of biochar addition on ammonia and nitrate were studied. The results showed that in the 0-100 cm soil, with the increase of soil depth, the content of nitrate decreased gradually, and the leaching amount of ammonium and nitrate in different soil layers decreased significantly when biochar (WFB, 80%WFB) was applied. The leaching amount of ammonium in the 0-60 cm soil layer under WFB and 80%WFB was 52.87% and 49.39% lower than that of the control (WF) (P<0.05), respectively; the leaching amount of nitrate in 0-40 cm soil layer under WFB was 32.22% lower than that in WF(P<0.05). During the growth period of eggplant, the application of biochar could increase the content of soil ammonium and nitrate at seedling stage and early fruit stage, thus inhibiting the leaching amount of nitrate in soil; however, the application of biochar had no effect on the content of ammonium and nitrate at full fruit stage and uproot stage. In conclusion, the application of biochar could effectively inhibit the leaching and migration of nitrogen in greenhouse vegetable field.

Key words: biochar, black soil of greenhouse vegetable field, ammonium nitrogen, nitrate nitrogen, migration

CLC Number:

S155.4

Wang Yao, Zhang Lei, Jiao Xiaoguang, Chen Yimin, Sui Yueyu. Effect of Biochar Addition on Soil Nitrogen Migration in Greenhouse Vegetable Field[J]. Chinese Agricultural Science Bulletin, 2020, 36(16): 91-95.

Figures/Tables 5

References 26

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深度/cm	有机碳/(g/kg)	全氮/(g/kg)	全磷/(g/kg)	pH	容重/(g/cm³)
0~20	26.9	2.5	2.1	6.93	1.07
20~40	18.3	1.7	1.1	6.45	1.28
40~60	14.8	1.3	0.6	6.80	1.25
60~80	9.8	0.9	0.4	6.85	1.33
80~100	9.6	0.8	0.6	6.75	1.41

深度/cm	有机碳/(g/kg)	全氮/(g/kg)	全磷/(g/kg)	pH	容重/(g/cm³)
0~20	26.9	2.5	2.1	6.93	1.07
20~40	18.3	1.7	1.1	6.45	1.28
40~60	14.8	1.3	0.6	6.80	1.25
60~80	9.8	0.9	0.4	6.85	1.33
80~100	9.6	0.8	0.6	6.75	1.41