AI Article Synopsis
- This paper investigates how various multiple cropping systems impact weed growth and diversity in paddy-upland rotations over a long-term field study.
- The milk vetch-early rice-late maize rotation, specifically when intercropped with early soybean and late rice, showed the most effective results in reducing weed density and dominance.
- The key weed species identified were Monochoia vaginalis, Echinochloa crusgalli, and Sagittaria pygmae, with notable similarity in weed communities across different cropping systems, though some less dominant weeds can still cause damage.
Article Abstract
Based on a long term field experiment, this paper studied the effects of different multiple cropping systems on the weed community composition and species diversity under paddy-upland rotation. The multiple cropping rotation systems could significantly decrease weed density and inhibited weed growth. Among the rotation systems, the milk vetch-early rice-late maize --> milk vetchearly maize intercropped with early soybean-late rice (CCSR) had the lowest weed species dominance, which inhibited the dominant weeds and decreased their damage. Under different multiple cropping systems, the main weed community was all composed of Monochoia vaginalis, Echinochloa crusgalli, and Sagittaria pygmae, and the similarity of weed community was higher, with the highest similarity appeared in milk vetch-early rice-late maize intercropped with late soybean --> milk vetch-early maize-late rice (CSCR) and in CCSR. In sum, the multiple cropping rotations in paddy field could inhibit weeds to a certain extent, but attentions should be paid to the damage of some less important weeds.
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