Accumulated temperature requirements of Echinochloa crus-galli seed-setting: A case study with populations collected from rice fields,Weed Biology and Management

当前位置： X-MOL 学术 › Weed Biol. Manag. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Accumulated temperature requirements of Echinochloa crus-galli seed-setting: A case study with populations collected from rice fields
Weed Biology and Management ( IF 1.4 ) Pub Date : 2022-06-13 , DOI: 10.1111/wbm.12248
Guoqi Chen ₁ , Yang Chen ₁ , Hang Yu ₁ , Lin Zhou ₁ , Xiangxin Zhuang ₁

Affiliation

Effective accumulated temperature (EAT) is a basic index to predict plant growing and development, while EATs for key stages during Echinochloa crus-galli seed-setting are still unclear. We collected three E. crus-galli populations (Nanling [NL], Feidong [FD], and Sihong [SH]) from different rice fields in eastern China and conducted four sets of pot experiments in a greenhouse. Plants of the three populations sown on May 9–12, averagely reproduced 484–671 mature seeds per plant; showed a duration of 67–76 days from sowing to heading, with an average EAT of 1,156–1,274°C; showed a duration of 90–94 days from sowing to seeds starting maturation in plant individuals with average EATs about 1,571–1,647°C; and showed a maturation stage lasting for 14–36 days. Significant negative correlations (p < .01) were found between the period of collecting day after seed maturation and the number or 1,000-seed weight of mature seeds collected on the day, in each set of experiment. Compared with NL individuals sown on May 9, NL individuals sown on April 10 needed significantly higher EATs for periods from sowing to seed maturation, and from heading to seed maturation. According to logistic regressions, duration days needed for 50% of seeds to mature were 93–122 days after sowing, with EATs of 1,625–1893°C for these E. crus-galli populations. This study revealed EATs for E. crus-galli seed-setting, which suggested time windows for panicle-removing control of E. crus-galli in rice fields.

更新日期：2022-06-14

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>