Seed bank dynamics and emergence pattern of weeds as affected by tillage systems in dry direct-seeded rice

Singh, Manpreet; Bhullar, Makhan S.; Chauhan, Bhagirath Singh

doi:10.1016/j.cropro.2014.10.015

Cited by 46 publications

(35 citation statements)

References 22 publications

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“…Higher species richness and Shannon-Weaver index in top 0-10 cm indicate more diverse number of weed species exists; further, higher Simpson index in 0-10 and 10-20 cm soil depth signifies the dominance of some of the species in the upper layer as compared to the lower depth. Usually, the weed seeds from plants firstly occupy the upper soil surface during primary dispersal process [48]; later on, through soil turning tillage process, the dormant seeds reach to the deeper layer [49].…”

Section: Soil Depthmentioning

confidence: 99%

Changes in the Weed Seed Bank in Long-Term Establishment Methods Trials under Rice-Wheat Cropping System

et al. 2020

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The rice-wheat cropping system in the Indo-Gangetic Plains is the backbone of food security in India. In the 1990s, due to the scarcity of resources, the traditional Crop Establishment (CE) method shifted from Conventional Till Puddle Transplanted Rice (CTPTR) to CT Direct Seeded Rice (CTDSR) and Zero-Till DSR (ZTDSR) in paddy; and in wheat, from Conventional Till Wheat (CTW) to Zero Till Wheat (ZTW), with residue retention in rice (RRR) or in both rice and wheat (RRRW). Shift in CE methods led to change in Weed Seed Bank (WSB) dynamics and ultimately affected the weed management program. After five years of field trials, soil samples were drawn as per 2-factors factorial randomized block design. Factor-I comprised 4-CE methods, whereas factor-II consisted of 3-soil depths (0-10, 10-20 and 20-30 cm). Results showed CTPTR-CTW and ZTDSR-ZTW (RRRW) record the highest seed bank (SB) of grasses, sedges and BLWs as total weeds, in general; and predominant weeds like Echinochloa spp., Ammania baccifera, Commelina benghalensis and Digitaria sanguinalis, in particular. It also showed the higher species richness (D Mg ) and Shannon-Weaver (H') indices. CTDSR-CTW and CTDSR-ZTW (RRR) show the lowest WSB and at par with Shannon-Weaver (H') index; further, lowest species richness (D Mg ) under CTDSR-CTW. Species Evenness (J') and Simpson index (λ) vary non-significantly with CE methods. Furthermore, 0-10 cm soil depth showed the highest SB of different category of total weed, predominant weeds as well as higher values of D Mg , H', and λ; whereas reverse trend was observed in Whittaker Statistic (β W ). Interaction between CE methods and soil depth revealed most of WSB lying on the top layer in case of ZTDSR-ZTW (RRRW) and CTDSR-ZTW (RRR); while CTPTR-CTW showed almost uniform WSB distribution, and in case of CTDSR-CTW, a gradual decrease in WSB with soil depth.

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Section: Soil Depthmentioning

confidence: 99%

Changes in the Weed Seed Bank in Long-Term Establishment Methods Trials under Rice-Wheat Cropping System

et al. 2020

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“…Changes in tillage practices, however, influence the vertical distribution of weed seeds in the soil (Chauhan et al, 2006b), and this may affect the relative abundance of weed species in the field (Froud-Williams et al, 1981). A large proportion of the weed seed bank remains on or close to the soil surface after crop planting in ZT systems (Chauhan et al, 2006b;Singh et al, 2015), which may promote greater emergence of weed species that require light to germinate. With conventional tillage (CONT), however, seedling emergence depends partly on the effect that tillage has on seed burial as deeply buried seeds may not be able to emerge.…”

Section: Introductionmentioning

confidence: 97%

Influence of tillage, cover cropping, and herbicides on weeds and productivity of dry direct-seeded rice

Singh

Bhullar

Chauhan

2015

Soil and Tillage Research

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“…Current agricultural management affects weed seed banks, but often with unpredictable results. For example, conventional tillage in dryland rice production suppresses Echinochloa colona emergence but boosts Echinochloa crus‐galli . Some of this unpredictability can be explained by the inherent plasticity of weeds in response to population management and density .…”

Section: Managing the Weed Seed Bankmentioning

confidence: 99%

“…For example, conventional tillage in dryland rice production suppresses Echinochloa colona emergence but boosts Echinochloa crus-galli. 60 Some of this unpredictability can be explained by the inherent plasticity of weeds in response to population management and density. 61 Additionally, the persistence of weed seeds in the soil buffers community response to management, with a lag time of at least 3 years between management and large-scale weed population response.…”

Section: Managing the Weed Seed Bankmentioning

confidence: 99%

Improving soil seed bank management

Haring

Flessner

2018

Pest Management Science

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Problems associated with simplified weed management motivate efforts for diversification. Integrated weed management uses the fundamentals of weed biology and applied ecology to provide a framework for diversified weed management programs; the soil seed bank comprises a necessary part of this framework. By targeting seeds, growers can inhibit the propagule pressure on which annual weeds depend for agricultural invasion. Some current management practices affect weed seed banks, such as crop rotation and tillage, but these tools are often used without specific intention to manage weed seeds. Difficulties quantifying the weed seed bank, understanding seed bank phenology, and linking seed banks to emerged weed communities challenge existing soil seed bank management practices. Improved seed bank quantification methods could include DNA profiling of the soil seed bank, mark and recapture, or 3D LIDAR mapping. Successful and sustainable soil seed bank management must constrain functionally diverse and changing weed communities. Harvest weed seed controls represent a step forward, but over-reliance on this singular technique could make it short-lived. Researchers must explore tools inspired by other pest management disciplines, such as gene drives or habitat modification for predatory organisms. Future weed seed bank management will combine multiple complementary practices that enhance diverse agroecosystems. © 2018 Society of Chemical Industry.

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Seed bank dynamics and emergence pattern of weeds as affected by tillage systems in dry direct-seeded rice

Cited by 46 publications

References 22 publications

Changes in the Weed Seed Bank in Long-Term Establishment Methods Trials under Rice-Wheat Cropping System

Changes in the Weed Seed Bank in Long-Term Establishment Methods Trials under Rice-Wheat Cropping System

Influence of tillage, cover cropping, and herbicides on weeds and productivity of dry direct-seeded rice

Improving soil seed bank management

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