Straw biologic black charcoal soil treating method for decreasing discharge of nitrous oxide in farmland
A soil treatment and nitrous oxide technology, applied in chemical instruments and methods, soil preparation methods, soil conditioning materials, etc., to achieve the effects of reducing N2O emissions, strong adsorption, and promoting crop growth
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Embodiment 1
[0023] Collect wheat stalks, rice stalks or corn stalks, air-dry or air-dry to make the water content less than 20%; then put them into a pool-type oxygen-limited pyrolysis carbonization furnace or a vertical kiln-type oxygen-limited pyrolysis carbonization furnace at 300-500°C Carbonize to obtain bio-black carbon, then grind, sieve, and mix and homogenize to obtain bio-black with a particle diameter of <0.25 mm;
Embodiment 2
[0025] Dry land of Huanghuaihai Plain:
[0026] Test treatment, choose embodiment 1 to prepare the biological black carbon of particle diameter-1 (denoted as C1, C2) 2 treatments, in order to test the application of biological black carbon to reduce N 2 O effect, another treatment without black carbon (denoted as C0), and nitrogen (N0) and nitrogen (N1) at the same time, the amount is 300 kg N ha -1 , the fertilizer is urea, of which 60% is used as base fertilizer and 40% is used as topdressing), a total of 6 treatments, the experiment was repeated 3 times, a total of 18 plots were arranged in random blocks, and the area of a single plot was 20 m 2 .
[0027] Agronomic management of each plot is the same as for local production.
[0028] Corn cultivation management: corn (Zhengdan 958) was sown on June 17, 2010, and harvested on September 26, 2010. The basal fertilizer also included 75 kg P in all treatments 2 o 5 ha -1 of calcium dihydrogen phosphate and 90 kg K 2 O...
Embodiment 3
[0034] Rice fields in the Taihu Plain:
[0035] Test treatment: choose embodiment 1 to prepare bio-black carbon with a particle diameter of -1 (Denoted as C1, C2, C3) 3 treatments, in order to test the application of bio-black carbon to reduce N 2 O effect, another treatment without black carbon (C0), and nitrogen (N0) and nitrogen (N1) at the same time, the dosage is 300 kg N ha -1 , the fertilizer is urea, of which 40% is used as basal fertilizer, 40% is used as tiller fertilizer, and 20% is used as ear fertilizer); a total of 8 treatments, each with 3 repetitions, a total of 24 plots, with a single plot area of 20m 2 , random block arrangement. Agronomic management of each plot is the same as for local production.
[0036] Rice cultivation and management: Rice (Wuyunjing 7) was transplanted on June 13, 2009, seedling fertilizer was applied on June 16, tillering fertilizer and ear fertilizer were applied on August 5 and August 25, respectively. The basal fertilizer also...
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