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首页> 外文期刊>Crop & Pasture Science >Environmental factors affect seed germination and seedling emergence of invasive Centaurea balsamita
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Environmental factors affect seed germination and seedling emergence of invasive Centaurea balsamita

机译：环境因素影响侵入式中心的种子萌发和幼苗出现Balsamita

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摘要

Centaurea balsamita is a problematic and invasive weed of agricultural fields in western Iran. This study was conducted to determine the effect of different environmental factors on germination and seedling emergence of this weed species. Results revealed that seed germination occurred over a wide range of temperatures (from 5 degrees C to 35 degrees C) with the highest germination at 25 degrees C. Seed germination of C. balsamita was similar between light and dark conditions. Germination decreased with increased in water stress levels, but some seeds were capable of germinating at -1.4 MPa osmotic potential. Seed germination was sensitive to salt stress and complete inhibition occurred at 150 mM sodium chloride. Seed germination of C. balsamita occurred over a pH range of 4-10 with lowest seed germination at pH 4. Seed germination was inhibited by increasing concentrations of potassium nitrate. No seedlings emerged when seeds were buried in the soil at depths greater than 6 cm, suggesting that using a sweep cultivator in crops and deep tillage would be beneficial in managing C. balsamita. The ability of C. balsamita to germinate under a wide range of temperature regimes and high levels of osmotic potential shows that this weed is well adapted to invade other cropping regions, especially rain-fed fields in western Iran.
机译：Centaurea Balsamita是伊朗西部农业领域的有问题和侵入性杂草。进行该研究以确定不同环境因素对这种杂草物种的发芽和幼苗出现的影响。结果表明，在宽范围的温度（从5摄氏度至35℃）上发生种子萌发，在25摄氏度下发芽的最高萌发。光和暗条件之间的C.Balsamita的种子萌发类似。水胁迫水平萌发随着水分压力的增加而降低，但有些种子能够在-1.4MPa渗透潜力下发芽。种子萌发对盐胁迫敏感，并且在150mM氯化钠中发生完全抑制。 C. Balsamita的种子萌发在4-10的pH范围内发生，PH4的最低种子萌发。通过增加硝酸钾浓度抑制种子萌发。当在大于6厘米的深度埋入土壤中时，没有出现幼苗，表明使用作物中的扫描栽培者和深耕的培养培养者将是有益的管理C.Balsamita。 C.Balsamita在广泛的温度制度下发芽的能力和高水平的渗透潜力表明，这种杂草很适合入侵其他种植地区，特别是伊朗西部的雨水领域。

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