Abstract Ipomoea eriocarpa R. Br., an annual prostrate plant, is a troublesome weed species in the tropical and sub-tropical regions of Asia, Africa, and Australia. For a better understanding of the plant's ecology, a seed germination study was conducted in order to predict the weed's ability to increase its global distribution, as well as presenting suitable management strategies for combating its spread. Germination and emergence of I. eriocarpa were examined in order to investigate the impact of abiotic factors such as temperature, salinity, moisture, soil pH, and burial depth on seeds. Germination and growth experiments were conducted under a completely randomized design with four replications. Maximum germination (77.5%) of I. eriocarpa occurred at 25 °C, decreasing according to an increase in temperature. A decrease in germination from 77.5 to 27.5% was observed where salinity increased from 0 to 200 mM of sodium chloride (NaCl). Germination of I. eriocarpa was 75% in no-water stress conditions; however, it gradually decreased with increasing water stress, with 32.5% germination at −0.8 MPa osmotic potential and no germination at −0.1 MPa osmotic potential. Germination was similar (74–76%) at pH levels ranging from 5 to 8 and decreased to 38% at pH 10. Optimal sowing depths ranged from 2 to 6 cm. Emergence decreased to 37.5% and 12.5% at burial depths of 8 and 10 cm, respectively. Our results suggest that I. eriocarpa has the potential to germinate, emerge and survive under different ecological conditions. Soil solarisation, organic manure application, and deep ploughing all respectively assist in altering the soil temperature, soil pH, and seed burial depths of I. eriocarpa, contributing towards the effective management of this weed species.

中文翻译：

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不同环境因素对木瓜萌发和出苗的影响。

摘要 Ipomoea eriocarpa R. Br. 一年生匍匐植物，是亚洲、非洲和澳大利亚热带和亚热带地区的一种麻烦杂草。为了更好地了解植物的生态学，进行了种子发芽研究，以预测杂草增加其全球分布的能力，并提出适当的管理策略以防止其传播。为了研究温度、盐度、水分、土壤 pH 值和埋藏深度等非生物因素对种子的影响，我们检查了毛果树的萌发和出苗。发芽和生长实验在完全随机设计下进行，重复四次。I. eriocarpa 的最大发芽 (77.5%) 发生在 25 °C，随着温度的升高而减少。当氯化钠 (NaCl) 的盐度从 0 增加到 200 mM 时，观察到发芽率从 77.5% 减少到 27.5%。I. eriocarpa 在无水分胁迫条件下的发芽率为 75%；然而，它随着水分胁迫的增加而逐渐降低，在-0.8 MPa渗透势下发芽率为32.5%，在-0.1 MPa渗透势下不发芽。发芽率在 5 到 8 的 pH 值范围内相似（74-76%），在 pH 值 10 时下降到 38%。最佳播种深度为 2 到 6 厘米。在埋深 8 厘米和 10 厘米处，出土率分别下降到 37.5% 和 12.5%。我们的研究结果表明，I. eriocarpa 具有在不同生态条件下发芽、出现和生存的潜力。土壤日晒、有机肥施用和深耕都分别有助于改变土壤温度、土壤酸碱度、