当前位置: X-MOL 学术Arch. Agron. Soil. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of tillage and irrigation on Southeastern U.S. soils under cellulosic sorghum feedstock production
Archives of Agronomy and Soil Science ( IF 2.4 ) Pub Date : 2020-08-07 , DOI: 10.1080/03650340.2020.1802430
Alexandre Caldeira Rocateli 1 , Randy Lee Raper 2 , Francisco Arriaga 3 , Kipling Shane Balkcom 4
Affiliation  

ABSTRACT

Sorghum may be a good cellulosic material for bioenergy production because it can be cultivated in current row-crop systems. However, the production of sorghum for bioenergy and its impacts on Southeastern U.S. soils should be investigated to determine the most environmentally sustainable system. The objective of this study was to evaluate tillage (conventional vs. conservation systems), and irrigation effect (irrigated vs. non-irrigated) on soil characteristics when producing cellulosic feedstock from three forage sorghums and one forage corn (control) in 2008 and 2009. Results showed that soil organic carbon (SOC) increased at a depth of 0.10–0.15 m, but decreased at a depth of 0.40–0.45 m with higher losses being found using conventional tillage as opposed to conservation tillage. Total nitrogen (TN) and bulk density (Bd) increased at all evaluated soil depths (0–0.50 m) after 2 years. Conventional tillage plots also showed higher Bd at 0.15–0.30 m. Higher Bd in conventional tillage plots might restrict water drainage which could explain higher volumetric soil water content (SWC) at 0.10, 0.20 and 0.40 m soil depths. Cone Index (CI) values also showed improved soil conditions at in-row positions for conservation plots.



中文翻译:

在纤维素高粱原料生产条件下耕作和灌溉对美国东南部土壤的影响

摘要

高粱可能是一种很好的生物能源生产纤维素材料,因为它可以在当前的行间作物系统中种植。然而,应调查用于生物能源的高粱生产及其对美国东南部土壤的影响,以确定最环保的可持续系统。本研究的目的是评估在 2008 年和 2009 年用三种饲料高粱和一种饲料玉米(对照)生产纤维素原料时的耕作(传统与保护系统)和灌溉效果(灌溉与非灌溉)对土壤特性的影响. 结果表明,土壤有机碳 (SOC) 在 0.10-0.15 m 深度增加,但在 0.40-0.45 m 深度下降,使用传统耕作与保护性耕作相比损失更大。2 年后,在所有评估的土壤深度(0-0.50 m)处,总氮 (TN) 和容重 (Bd) 增加。常规耕作地块在 0.15-0.30 m 处也显示出较高的 Bd。常规耕作地块中较高的 Bd 可能会限制排水,这可以解释 0.10、0.20 和 0.40 m 土壤深度处较高的土壤体积含水量 (SWC)。锥体指数 (CI) 值还显示保护地块行内位置的土壤条件有所改善。

更新日期:2020-08-07
down
wechat
bug