Effect of ecologically-based weed management strategies on weed community and diversity in hilly tea plantations

Zuoxiang, Xiang; WuXiong, Shan; QiuHong, He; Xiao, Ru; HuaQin, Xu; Chen, Pei; Xiao, Cheng

doi:10.3724/sp.j.1011.2009.00857

Cited by 1 publication

(1 citation statement)

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“…For weed species richness, species diversity, and evenness, when the degree of dominance is smaller, the community structure is more complex, and the feedback system is more powerful. For changes in the environment, or from species population, the stronger the buffer action of the internal population, the more stable the uctuations in species community, the less prominent is the weed community advantage, and hence, less likely the occurrence of weeds (Xiang et al, 2009).…”

Section: Effect Of Mrsf-crbf On the Community In Paddy Eldsmentioning

confidence: 99%

Regulation of machine-transplanted rice using side-deep fertilization on weed community and diversity influences rice production in double-cropping paddy

Zhong

Zhou

Luo

et al. 2023

Preprint

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Weed control and biodiversity conservation are required for sustainable agricultural production. The impact of long-term chemical fertilization on the agroecological environment has attracted widespread attention. To validate the effects of machine-transplanted rice using side-deep fertilization (MRSF) on weed control and weed community composition in paddy fields, a field experiment was conducted in a double-cropping rice system at the Dongting Lake in southern China. Seven fertilization treatments for early- and late-season rice were tested, including control (CK), conventional fertilization (CF), and MRSF with controlled-release blending fertilizer (MRSF-CRBF) at various nitrogen (N) rates (MC, 10% MC, 20% MC, 30% MC, and 40% MC). The highest yields of early- and late-season rice were obtained with 10% MC and 40% MC, respectively, with an increase by 2.5% and 5.0% compared to the CF treatment. The CK treatment exhibited the least weed species, while CF treatment the highest Shannon index across growth stages. The highest weed biomass of early- and late-season rice was observed under CF treatment, which was 4.5–37.7% and 4.5–24.1% higher than those in the 0–40% MC treatments, respectively. Soil pH, available potassium and available phosphorus (P) in the double-cropping paddy field were negatively correlated with weed biomass. Soil available N content was positively correlated with weed biomass in early- versus late-season rice. Soil available P content indirectly affected total weed biomass via pH and available N. Redundancy analysis showed that weed biomass was negatively correlated with soil physicochemical properties, and soil available N and organic matter content had significant effects on weed distribution. In conclusion, the MRSF-CRBF strategy effectively maintained suitable available N and P content during the late-season of rice growth, controlled weed growth, and achieved a beneficial dynamic balance between weed species and total biomass.

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Section: Effect Of Mrsf-crbf On the Community In Paddy Eldsmentioning

confidence: 99%