Survey of rice production practices and perception of weedy red rice (Oryza sativa f. spontanea) in Taiwan

Yung-Fen Huang; Dong-Hong Wu; Chih-Lu Wang; Pei-Rong Du; Chih-Yun Cheng; Chia-Chi Cheng

doi:10.1017/wsc.2020.73

Survey of rice production practices and perception of weedy red rice (Oryza sativa f. spontanea) in Taiwan

Journal

Weed Science

Journal Volume

69

Journal Issue

5

Pages

526-535

Date Issued

2021-09

Author(s)

Yung-Fen Huang

Dong-Hong Wu

Chih-Lu Wang

Pei-Rong Du

Chih-Yun Cheng

Chia-Chi Cheng

DOI

10.1017/wsc.2020.73

10.1017/wsc.2021.46

URI

https://www.cambridge.org/core/journals/weed-science/article/survey-of-rice-production-practices-and-perception-of-weedy-red-rice-oryza-sativa-f-spontanea-in-taiwan/A8DA6FB52B3A9BE2D53CF72BBF513422#

https://scholars.tari.gov.tw/handle/123456789/16171

https://bioone.org/journals/weed-science/volume-69/issue-5/wsc.2021.46/Survey-of-Rice-Production-Practices-and-Perception-of-Weedy-Red/10.1017/wsc.2021.46.full

https://www.cambridge.org/core/journals/weed-science/article/survey-of-rice-production-practices-and-perception-of-weedy-red-rice-oryza-sativa-f-spontanea-in-taiwan-erratum/52211234B5FE16C2CF24005AE444EB1E

Abstract

Rice (Oryza sativa L.) is the primary staple crop in Taiwan, and it can be grown twice a year. The prevalent subspecies grown in Taiwan is Japonica, and a transplanting system is used for rice production. Although the transplanting system is known for efficient weed control at the seedling stage, weedy red rice (WRR, O. sativa f. spontanea) infestation is progressively being reported. Fieldwork and previous studies have suggested that WRR infestation in Taiwan is probably related to growers' operating practices and their perception of WRR. However, no data are available for a detailed investigation. The present study aimed to collect data on rice growers' backgrounds, farming practices, and perceptions of WRR to quantify and characterize the patterns of farming operations for rice growers in Taiwan and to investigate factors contributing to WRR infestation. We collected 408 questionnaires completed by rice growers from 17 counties covering all rice production regions in Taiwan. The growers' median age was 51 to 60 yr, and 75% of respondents had paddies from 0.25 to 2.75 ha in size, which corresponded with nationwide data for farmers' backgrounds. In general, growers applied similar farming practices for both cropping seasons. Most respondents did not notice WRR infestation or consider it to be a problem: only 9.8% noticed a moderate to severe infestation of WRR in their fields. The major perceived causes of WRR infestation was seed impurity (55.1%) or cultivar degeneration (18.6%). Correlation analysis and farming patterns estimated with a nonnegative matrix factorization algorithm showed that WRR contamination rate was due to the use of dry or wet tillage. The present study provides the first quantitative and qualitative evidence of rice production practices and growers' perceptions of WRR infestation in Taiwan.

Subjects

japonica

limitrophe between subtropic and tropic

transplanting system

Publisher

Cambridge University Press

Type

journal article