The nitrogen transport characteristics in tobacco planting soil under biochar combined with organic-bio-bacteria-fertilizer in central HenanChinese Full TextEnglish Full Text (MT)
LI Xiaolei;LI Ying;JIANG Guiying;LIU Fang;LIU Shiliang;ZHAO Yunfeng;LONG Qian;DONG Shigang;College of Resources and Environment,Henan Agricultural University;Dengfeng Committee of Agricultural and Rural Affairs;
Abstract: On the basis of applied chemical fertilizer of( m（ N） : m（ P2O5） : m（ K2 O） = 10 ∶ 10 ∶ 20,525 kg · hm-2),six treatments in field trial were set as follows: CK（ no organic fertilizer）; B（ biochar）; OBBF（ organic-bio-bacteria-fertilizer OBBF）; B-OBBF55（ 50% OBBF combined 50%biochar）; B-OBBF46（ 40% biochar combined 60% OBBF）; B-OBBF64（ 60% biochar combined40% OBBF）. The contents and migration characteristics of diverse nitrogen forms in different layers of soil were measured and analyzed. The results showed that soil available nitrogen（ AN） and total nitrogen（ TN） mass fraction were significantly increased under OBBF treatment. The application of biochar combined with different ratios of OBBF could not only improve the AN content,but also reduce the eluviation loss of AN. Under B-OBBF55 treatment,the AN content could reach the highest value of74. 6 mg·kg-1. The ammonium nitrogen and nitrate nitrogen mass fraction were improved at 0 ～ 20 cm layer of soil after tobacco transplanted 60 d under B-OBBF55 and B-OBBF46 treatments. The effects of different fertilizers on soil microbial nitrogen（ SMBN） were mainly in 0 ～ 40 cm layer of soil before the tobacco transplanted 60 d,and the highest one was 542. 2 mg · kg-1 under OBBF treatment. The ratios of nitrate nitrogen to TN were higher under B-OBBF55 and B-OBBF46 treatments at tobacco transplanted 60 d. Therefore,the application of B-OBBF55 and B-OBBF46 treatments is an effective measure to cultivate the tobacco plantation soil and improve the soil nitrogen conversion in the Central of Henan province.
Keywords：
tobacco plantation soil; biochar; organic-bio-bacteria-fertilizer（OBBF）; nitrogen transport;
- DOI：
10.16445/j.cnki.1000-2340.2019.04.018
- Series：
(D) Agriculture
- Subject：
Fundamental Science of Agriculture; Agronomy; Crop
- Classification Code：
S572;S153.6
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