Cover Crop Complements Flue Gas Desulfurized Gypsum to Improve No-till Soil Quality. Issue 9 (15th May 2021)
- Record Type:
- Journal Article
- Title:
- Cover Crop Complements Flue Gas Desulfurized Gypsum to Improve No-till Soil Quality. Issue 9 (15th May 2021)
- Main Title:
- Cover Crop Complements Flue Gas Desulfurized Gypsum to Improve No-till Soil Quality
- Authors:
- Islam, Khandakar R.
Roth, Greg
Rahman, Mohammad A.
Didenko, Nataliia O.
Reeder, Randall C. - Abstract:
- ABSTRACT: Integration of flue gas desulfurized gypsum (FGD-gypsum) with cover crops is expected to improve soil quality (SQ). Our objectives were to evaluate the impact of FGD-gypsum and rye on SQ and the contribution of core indicators to account for SQ variability in a rainfed corn-soybean system. A completely randomized design (CRD) with two FGD-gypsum rates (control vs. 1, 120 kg/ha) x two cover crops (control vs. rye) was conducted. Results showed that both FGD-gypsum and cover crop variably affected soil properties; however, their impact on SQ was more pronounced when integrated. Soil bio-efficiency increased via a large microbial biomass (SMB) pool and higher enzyme activities with a decrease (38%) in microbial catabolism (qCO2 ). Soil chemical balancing increased 15% by active carbon (AC), 26% by active nitrogen (AN), 50% by particulate organic carbon (POC), 58% by particulate organic nitrogen (PON) and 53% by particulate organic phosphorus (POP) contents. Improved physical stability increased aggregate stability (>250 µm) contributed to higher POC, PON, and POP enrichment within aggregates. The increased bio-efficiency, chemical balancing, and physical stability as impacted by FGD-gypsum and cover crop consequently improved SQ. Principal components analysis (PCA) identified eight indicators to calculate for minimum dataset SQ index (SQIMDS ), which explained for 86% of the variability in generalized SQI (SQIgen ). A lack of non-significant difference between SQIgABSTRACT: Integration of flue gas desulfurized gypsum (FGD-gypsum) with cover crops is expected to improve soil quality (SQ). Our objectives were to evaluate the impact of FGD-gypsum and rye on SQ and the contribution of core indicators to account for SQ variability in a rainfed corn-soybean system. A completely randomized design (CRD) with two FGD-gypsum rates (control vs. 1, 120 kg/ha) x two cover crops (control vs. rye) was conducted. Results showed that both FGD-gypsum and cover crop variably affected soil properties; however, their impact on SQ was more pronounced when integrated. Soil bio-efficiency increased via a large microbial biomass (SMB) pool and higher enzyme activities with a decrease (38%) in microbial catabolism (qCO2 ). Soil chemical balancing increased 15% by active carbon (AC), 26% by active nitrogen (AN), 50% by particulate organic carbon (POC), 58% by particulate organic nitrogen (PON) and 53% by particulate organic phosphorus (POP) contents. Improved physical stability increased aggregate stability (>250 µm) contributed to higher POC, PON, and POP enrichment within aggregates. The increased bio-efficiency, chemical balancing, and physical stability as impacted by FGD-gypsum and cover crop consequently improved SQ. Principal components analysis (PCA) identified eight indicators to calculate for minimum dataset SQ index (SQIMDS ), which explained for 86% of the variability in generalized SQI (SQIgen ). A lack of non-significant difference between SQIg and SQIMDS suggesting that SQIMDS can be consistently used to quantify, compare, and predict SQ. A greater use of FGD-gypsum with cover crops will be important for proactive recycling of industrial by-products for growing crops. … (more)
- Is Part Of:
- Communications in soil science and plant analysis. Volume 52:Issue 9(2021)
- Journal:
- Communications in soil science and plant analysis
- Issue:
- Volume 52:Issue 9(2021)
- Issue Display:
- Volume 52, Issue 9 (2021)
- Year:
- 2021
- Volume:
- 52
- Issue:
- 9
- Issue Sort Value:
- 2021-0052-0009-0000
- Page Start:
- 926
- Page End:
- 947
- Publication Date:
- 2021-05-15
- Subjects:
- Microbial biomass -- urease -- active nitrogen -- particulate organic phosphorus -- aggregation index
Soil science -- Periodicals
Plants -- Chemical analysis -- Periodicals
Agricultural chemistry -- Periodicals
631.405 - Journal URLs:
- http://www.tandfonline.com/toc/lcss20/current ↗
http://www.tandfonline.com/ ↗ - DOI:
- 10.1080/00103624.2021.1872594 ↗
- Languages:
- English
- ISSNs:
- 0010-3624
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 3363.420000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 16803.xml