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Does Biochar Particle Size, Application Rate and Irrigation Regime Interact to Affect Soil Water Holding Capacity, Maize Growth and Nutrient Uptake?
Journal of Soil Science and Plant Nutrition ( IF 3.9 ) Pub Date : 2021-09-07 , DOI: 10.1007/s42729-021-00597-8
Eric Oppong Danso 1 , Francis Monnie 2 , Edward Benjamin Sabi 2 , Stephen Abenney-Mickson 3 , Emmanuel Arthur 4 , Mathias Neumann Andersen 4
Affiliation  

The purpose of this study was to investigate the sole and combined effects of biochar particle size (BPS), biochar application rate (BAR) and irrigation (IRR) on soil water holding capacity, maize total dry matter (TDM) and maize uptake of nitrogen (N) and phosphorus (P) in a sandy clay loam soil. Two biochar particle sizes of < 2 mm and 2–4 mm in combination with four biochar application rates of 0 t ha−1 (B0), 20 t ha−1 (B20), 40 t ha−1 (B40) and 80 t ha−1 (B80) were tested under either well-irrigated (Iw) or intermittent drought (Di) conditions. The BPS acting alone or in synergy with IRR and BAR did not significantly affect pot field capacity water content (FCpot), maize TDM, N and P uptakes. However, IRR and BAR significantly interacted to affect P uptake but not N uptake and FCpot. The B80 treatment recorded significantly higher TDM, N uptake and P uptake values of 119 g pot−1, 1833 mg pot−1 and 501 mg pot−1, compared with the counterpart B0 values of 99 g pot−1, 1487 mg pot−1 and 429 mg pot−1, respectively. The B20 and B40 treatments recorded intermediate values of the TDM, N and P uptakes, and they were not significantly different from the counterpart variables for the B0 treatment. The Iw treatment increased maize TDM, N and P uptakes by 28, 24 and 30%, respectively, relative to the Di treatment. Altogether, well-irrigated maize grown in sandy clay loam soil amended with either < 2 mm or 2–4 mm sized biochar, applied at 80 t ha−1, is likely to improve TDM as well as N and P uptakes.



中文翻译:

生物炭颗粒大小、施用率和灌溉制度是否相互作用以影响土壤持水能力、玉米生长和养分吸收?

本研究的目的是研究生物炭粒径 (BPS)、生物炭施用率 (BAR) 和灌溉 (IRR) 对土壤持水能力、玉米总干物质 (TDM) 和玉米吸收氮的唯一和综合影响。 (N) 和磷 (P) 在砂质粘壤土中。两种生物炭粒径 < 2 mm 和 2-4 mm,结合四种生物炭施用率:0 t ha -1 (B0)、20 t ha -1 (B20)、40 t ha -1 (B40) 和 80 t ha -1 (B80) 在良好灌溉 (I w ) 或间歇性干旱 (D i ) 条件下进行测试。BPS 单独作用或与 IRR 和 BAR 协同作用不会显着影响盆栽田间持水量(FC盆栽)、玉米 TDM、N 和 P 吸收。然而,IRR 和 BAR 显着相互作用以影响 P 吸收但不影响 N 吸收和 FC pot。与99 g pot -1、1487 mg pot -的对应B0值相比,B80处理记录了119 g pot -1、1833 mg pot -1和501 mg pot -1 的显着更高的TDM、N吸收和P吸收值。分别为 1和 429 mg pot -1。B20 和 B40 处理记录了 TDM、N 和 P 吸收的中间值,并且它们与 B0 处理的对应变量没有显着差异。相对于 D,I w处理使玉米 TDM、N 和 P 的吸收量分别增加了 28%、24% 和 30%治疗。总而言之,在沙质粘壤土中种植的灌溉良好的玉米,用 <2 毫米或 2-4 毫米大小的生物炭进行改良,施用 80 t ha -1,可能会提高 TDM 以及 N 和 P 的吸收。

更新日期:2021-09-07
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