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Singh RK, Upadhyay PK, Dhar S, G. A. R, Singh VK, Kumar R, Singh RK, Shekhawat K, Rathore SS, Dass A, Kumar A, Gupta G, Rajpoot S, Prakash V, Sarkar S, Sharma NK, Rawat S, Singh S. System of wheat intensification (SWI): Effects on lodging resistance, photosynthetic efficiency, soil biomes, and water productivity. PLoS One 2024; 19:e0299785. [PMID: 38598442 PMCID: PMC11006180 DOI: 10.1371/journal.pone.0299785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 02/16/2024] [Indexed: 04/12/2024] Open
Abstract
Intense cultivation with narrow row spacing in wheat, a common practice in the Indo-Gangetic plains of South Asia, renders the crop more susceptible to lodging during physiological maturity. This susceptibility, compounded by the use of traditional crop cultivars, has led to a substantial decline in overall crop productivity. In response to these challenges, a two-year field study on the system of wheat intensification (SWI) was conducted. The study involved three different cultivation methods in horizontal plots and four wheat genotypes in vertical plots, organized in a strip plot design. Our results exhibited that adoption of SWI at 20 cm × 20 cm resulted in significantly higher intercellular CO2 concentration (5.9-6.3%), transpiration rate (13.2-15.8%), stomatal conductance (55-59%), net photosynthetic rate (126-160%), and photosynthetically active radiation (PAR) interception (1.6-25.2%) over the existing conventional method (plant geometry 22.5 cm × continuous plant to plant spacing) of wheat cultivation. The lodging resistance capacity of both the lower and upper 3rd nodes was significantly higher in the SWI compared to other cultivation methods. Among different genotypes, HD 2967 demonstrated the highest recorded value for lodging resistance capacity, followed by HD 2851, HD 3086, and HD 2894. In addition, adoption of the SWI at 20 cm × 20 cm enhanced crop grain yield by 36.9-41.6%, and biological yield by 27.5-29.8%. Significantly higher soil dehydrogenase activity (12.06 μg TPF g-1 soil hr-1), arylsulfatase activity (82.8 μg p-nitro phenol g-1 soil hr-1), alkaline phosphatase activity (3.11 n moles ethylene g-1 soil hr-1), total polysaccharides, soil microbial biomass carbon, and soil chlorophyll content were also noted under SWI over conventional method of the production. Further, increased root volumes, surface root density and higher NPK uptake were recorded under SWI at 20×20 cm in comparison to rest of the treatments. Among the tested wheat genotypes, HD-2967 and HD-3086 had demonstrated notable increases in grain and biological yields, as well as improvements in the photosynthetically active radiation (PAR) and chlorophyll content. Therefore, adoption of SWI at 20 cm ×20 cm (square planting) with cultivars HD 2967 might be the best strategy for enhancing crop productivity and resource-use efficiency under the similar wheat growing conditions of India and similar agro-ecotypes of the globe.
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Affiliation(s)
- Ramesh Kumar Singh
- ICAR-Indian Agricultural Research Institute, New Delhi, India
- Department of Animal Husbandry, Lucknow, India
| | | | - Shiva Dhar
- ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Rajanna G. A.
- ICAR- Directorate of Groundnut Research, Regional Station, Ananthapur, India
| | - Vinod Kumar Singh
- ICAR-Central Research Institute for Dryland Agriculture, Hyderabad, India
| | - Rakesh Kumar
- ICAR-Research Complex for Eastern Region, Patna, India
| | | | | | | | - Anchal Dass
- ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Amit Kumar
- ICAR-Research Complex for NEH Region, Sikkim, India
| | - Gaurendra Gupta
- ICAR- Indian Grassland and Fodder Research Institute, Jhansi, India
| | | | | | | | | | - Satyam Rawat
- ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Satendra Singh
- ICAR-Indian Agricultural Research Institute, New Delhi, India
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Chen R, Li M, Yang J, Chen L, Zi X, Zhou H, Tang J. Exploring the effect of wilting on fermentation profiles and microbial community structure during ensiling and air exposure of king grass silage. Front Microbiol 2022; 13:971426. [PMID: 36160258 PMCID: PMC9493678 DOI: 10.3389/fmicb.2022.971426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/23/2022] [Indexed: 11/30/2022] Open
Abstract
In order to better understand the effect of wilting treatment on silage, we study analyzed the fermentation quality of unwilted (CK) and wilted (WT) king grass silage, and the dynamic changes of microorganisms in silage and aerobic exposure. After 30 days of silage, WT silage significantly reduced the pH of the silage (p < 0.05) and increased the contents of lactic acid and acetic acid (p < 0.05), but did not reduce the content of Ammonia-N (p > 0.05). Wilting treatment increased bacterial and fungal diversity during silage but decreased fungal diversity during aerobic exposure. The relative abundance of Lactococcus and Enterococcus in wilting silage increased. In the aerobic exposure stage, the relative abundance of Klebsiella decreased, but the relative abundance of Enterobacter increased in wilting treatment silage. In addition, the relative abundance of Acinetobacter and Ignatzschineria increased after 5 days of aerobic exposure. In contrast with unwilted silage, wilting treatment silage after aerobic exposure had no Candida, but the relative abundance of Wickerhamomyces increased. The results showed that wilting treatment could raise the silage quality of king grass. However, WT silage did not inhibit the reproduction of harmful microorganisms during aerobic exposure and did not significantly improve the aerobic stability of silage.
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Affiliation(s)
- Rong Chen
- Hainan University, Haikou, Hainan, China
| | - Mao Li
- Hainan University, Haikou, Hainan, China
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan, China
| | - Jinsong Yang
- Hainan University, Haikou, Hainan, China
- *Correspondence: Jinsong Yang,
| | - Liwei Chen
- Hainan University, Haikou, Hainan, China
| | - Xuejuan Zi
- Hainan University, Haikou, Hainan, China
- Xuejuan Zi,
| | - Hanlin Zhou
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan, China
| | - Jun Tang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan, China
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Long S, Li X, Yuan X, Su R, Pan J, Chang Y, Shi M, Cui Z, Huang N, Wang J. The Effect of Early and Delayed Harvest on Dynamics of Fermentation Profile, Chemical Composition, and Bacterial Community of King Grass Silage. Front Microbiol 2022; 13:864649. [PMID: 35464971 PMCID: PMC9022070 DOI: 10.3389/fmicb.2022.864649] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 02/23/2022] [Indexed: 11/13/2022] Open
Abstract
The objective of this study was to assess the effect of harvesting time on the fermentation characteristics, chemical composition, and microbial community of king grass silage. King grass was harvested at three growth periods of 90 days (KN90S), 110 days (KN110S), and 130 days (KN130S); chopped into 2-3-cm particle size; and ensiled in polyethylene bags (20 × 30 cm). The fermentation quality and chemical composition of silages were analyzed after 1, 3, 7, 14, 30, and 60 days of ensiling. Bacterial community of silage ensiled for 60 days was profiled using next generation sequencing (NGS) technology. The KN110S showed the most extensive lactic acid (LA) fermentation during 7 days of fermentation compared to KN90S and KN130S. After 60 days of fermentation, the KN110S showed the lowest pH and the highest lactic acid content among the three treatments. The butyric acid and ammonia nitrogen contents of KN90S and KN130S were significantly greater than those of KN110S (p < 0.05). After a timespan of 60 days of ensiling, the bacterial community of king grass silage was predominantly populated by Proteobacteria in phylum level, whereas unclassified Enterobacteriaceae genus remained dominant in all silages. A higher relative abundance of Clostridium was observed in KN90S and KN130S, but not in KN110S, and greater abundance of Lactococcus appeared in KN110S and KN130S silages than KN90S. It is concluded that harvesting time had an important effect on the fermentation quality and microbial community of king grass silage.
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Affiliation(s)
- Shihe Long
- College of Animal Science and Technology, Hainan University, Haikou, China
| | - Xuefeng Li
- College of Forestry, Hainan University, Haikou, China
| | - Xianjun Yuan
- Institute of Ensiling and Processing of Grass, Nanjing Agricultural University, Nanjing, China
| | - Rina Su
- State Key Laboratory of Grassland Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Junxin Pan
- College of Animal Science and Technology, Hainan University, Haikou, China
| | - Ye Chang
- College of Animal Science and Technology, Hainan University, Haikou, China
| | - Mengli Shi
- College of Animal Science and Technology, Hainan University, Haikou, China
| | - Zhihai Cui
- College of Animal Science and Technology, Hainan University, Haikou, China
| | - Naixin Huang
- College of Animal Science and Technology, Hainan University, Haikou, China
| | - Jian Wang
- College of Animal Science and Technology, Hainan University, Haikou, China
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