Abstract
Abstract. Lillo EP, Chavez MLM, Malaki AB, Alcazar SMT, Baoy RR, Margate MA, Abrigana M. 2022. Composition and diversity of weedy rice species in lowland irrigated rice field of Argao, Cebu, Philippines. Biodiversitas 23: 6275-6283. Weeds serve as a severe challenge for rice growers, causing annual crop losses worldwide. The study aims to provide baseline information on the composition and diversity of weedy rice species in lowland irrigated rice fields of Argao, Cebu, Philippines, as a basis for farmers' weed management practices. Field surveys were done using the quadrate method. A quadrate measuring 1m x 1m was randomly placed in weed-infested rice plantation areas. Weedy rice species inside the quadrate were identified. The diversity of species was computed using Shannon diversity index. A total of 53 species were recorded and classified into 21 families and 40 genera. Dominant weedy rice species during the vegetative stage was Sphenoclea zeylanica Gaertn., and Fimbristylis quinquangularis (Vahl) Kunth. for both the reproductive and harvesting stage. The site has a computed diversity value of H'=3.36 with a relative value of high species diversity, indicating less input in terms of weed management practices. The cluster analysis reveals that the lowland rice fields of Argao were covered by seven weedy rice communities. This situation could create a negative impact on rice production output. The similarity in species composition among sampling sites signifies uniformity in the application of specific weed management practices.
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Claims 6
Claim · model-written summary
A total of 53 weedy species in 21 families and 40 genera were recorded in the lowland irrigated rice fields of Argao, Cebu, Philippines.
Verbatim
e0“A total of 53 species were recorded and classified into 21 families and 40 genera”
t0“weedy rice species in lowland irrigated rice field of Argao, Cebu, Philippines”
Claim · model-written summary
Sphenoclea zeylanica was the dominant weedy species during the vegetative stage.
- Taxon
- Sphenoclea zeylanica Gaertn.
Sphenoclea zeylanicae0 - Organ / stage
- vegetative stagee0
- Outcome
- Dominant weedy rice speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dominant weedy rice species during the vegetative stage was Sphenoclea zeylanica Gaertn.”
Claim · model-written summary
Fimbristylis quinquangularis was the dominant weedy species during both the reproductive and harvesting stages.
- Taxon
- Fimbristylis quinquangularis (Vahl) Kunth.
Fimbristylis quinquangularise0 - Organ / stage
- reproductive and harvesting stagee0
- Outcome
- for both the reproductive and harvesting stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fimbristylis quinquangularis (Vahl) Kunth. for both the reproductive and harvesting stage”
Claim · model-written summary
The site had a Shannon diversity value of H'=3.36, a high species diversity.
Verbatim
e0“The site has a computed diversity value of H'=3.36 with a relative value of high species diversity”
t0“weedy rice species in lowland irrigated rice field of Argao, Cebu, Philippines”
Claim · model-written summary
Cluster analysis showed the lowland rice fields of Argao were covered by seven weedy rice communities.
Verbatim
e0“The cluster analysis reveals that the lowland rice fields of Argao were covered by seven weedy rice communities”
Claim · model-written summary
The authors interpret the similar species composition among sampling sites as uniform application of specific weed management practices.
Verbatim
e0“The similarity in species composition among sampling sites signifies uniformity in the application of specific weed management practices”
t0“weedy rice species in lowland irrigated rice field of Argao, Cebu, Philippines”