Effect of environmental factors, seed burial depth and straw mulch on germination and seedling emergence in Cichorium glandulosum

IF 2.1 2区农林科学 Q2 AGRONOMY

Weed Science Pub Date : 2024-01-15 DOI:10.1017/wsc.2023.78

R. Amini, Alireza Hasanfard, Nasrin Ahmadian, Farzaneh Zarei Yuzband

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引用次数: 0

Abstract

Cichorium glandulosum Boiss. et Huet is a species that has recently spread widely in the autumn crops of northwestern Iran. A study was conducted to evaluate the effect of environmental factors on the germination, emergence, and management of two populations of CG. The effects of temperature, photoperiod, NaCl concentration, osmotic potential, seed burial depth, and straw mulch were evaluated on seed germination and seedling emergence of two populations of C. gladulosum from Tabriz and Marand, Iran. The highest germination percentage was observed in the Tabriz population (93%) and Marand (94%) at 20/10C (day/night). In both populations, germination was 82-93% across a wide range of light/dark periods (8-24 hours of light). However, germination was significantly reduced (∼ 70%) under continuous darkness. The osmotic potential required to inhibit 50% of germination was 0.68 MPa for the Tabriz population and 0.62 MPa for the Marand population. The concentration of NaCl required to inhibit 50% of germination was 4.76 dS m-1 for the Tabriz population and 3.81 dS m-1 for the Marand population. The seed burial depths that caused a 50% decrease in emergence for the Tabriz and Marand populations were 1.86 cm and 2.22 cm, respectively. In the populations of Tabriz and Marand, the application of 6 t ha-1 of straw mulch resulted in a decrease in C. gladulosum emergence to 3% and 10%, respectively. This study’s results inform the conditions required for C. glandulosum germination and establish a theoretical and practical foundation for predicting, preventing, and managing this species using scientific principles C. glandulosum.

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环境因素、种子埋藏深度和秸秆覆盖物对禾本科植物发芽和出苗的影响

Cichorium glandulosum Boiss. et Huet 是一种最近在伊朗西北部秋季作物中广泛传播的物种。本研究评估了环境因素对两个 Cichium 种群的发芽、出苗和管理的影响。研究评估了温度、光周期、NaCl 浓度、渗透势、种子埋藏深度和稻草覆盖物对伊朗大不里士和马兰两个 C. gladulosum 种群的种子萌发和出苗的影响。大不里士种群的发芽率最高（93%），马兰种群的发芽率最高（94%），温度为 20/10C（昼/夜）。在这两个种群中，不同光照/黑暗时间段（8-24 小时光照）的发芽率均为 82-93%。然而，在持续黑暗条件下，发芽率明显降低（∼ 70%）。大不里士种群抑制 50% 发芽所需的渗透压为 0.68 兆帕，马兰种群为 0.62 兆帕。大不里士种群抑制 50% 发芽所需的氯化钠浓度为 4.76 dS m-1，马兰种群为 3.81 dS m-1。导致大不里士和马兰种群萌发率下降 50%的种子埋藏深度分别为 1.86 厘米和 2.22 厘米。在大不里士和马兰种群中，施用 6 t ha-1 的稻草覆盖物可使 C. gladulosum 的出苗率分别降低 3% 和 10%。这项研究的结果说明了吉丁虫发芽所需的条件，并为利用科学原理预测、预防和管理该物种奠定了理论和实践基础。

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来源期刊

Weed Science 农林科学-农艺学

CiteScore

4.60

自引率

12.00%

发文量

审稿时长

12-24 weeks

期刊介绍： Weed Science publishes original research and scholarship in the form of peer-reviewed articles focused on fundamental research directly related to all aspects of weed science in agricultural systems. Topics for Weed Science include: - the biology and ecology of weeds in agricultural, forestry, aquatic, turf, recreational, rights-of-way and other settings, genetics of weeds - herbicide resistance, chemistry, biochemistry, physiology and molecular action of herbicides and plant growth regulators used to manage undesirable vegetation - ecology of cropping and other agricultural systems as they relate to weed management - biological and ecological aspects of weed control tools including biological agents, and herbicide resistant crops - effect of weed management on soil, air and water.