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首页> 外文期刊>Weed Biology and Management >Effect of different weed management systems on the weed populations, and seedbank composition and distribution in tropical coconut plantations
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Effect of different weed management systems on the weed populations, and seedbank composition and distribution in tropical coconut plantations

机译：不同杂草处理系统对热带椰子种植园杂草种群，种子库组成和分布的影响

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Weeds are a perennial problem in coconut plantations and cause significant losses in the nut yield. The occurrence of a wide range of weeds also causes difficulties in their eradication. The influence of five different weed management practises on the distribution and composition of the soil weed seed bank in coconut plantations in the low-country dry zone of Sri Lanka was evaluated. The treatments imposed included the application of glyphosate (N-[phosphonomethyl]-glycine), cover cropping with Pueraria phaseoloides, tractor harrowing, tractor slashing, and tractor plowing. All the treatments were applied twice per year, except for the cover cropping treatment. In terms of a reduction in the weed biomass, the application of glyphosate and cover cropping (Pueraria) were more efficient in reducing the ground weed population. These methods were very effective in reducing the weed seed density in the top soil layers. Plowing and harrowing significantly reduced the seed bank in the top soil layers and shifted significant numbers of weed seeds to deeper soil profiles. However, the total germinated weed seed count increased by 123.5, 691.4, 1133.1, and 1216.5% in the 10-15, 15-20, 20-25, and 25-30 cm soil depths, respectively, compared with the initial germinated weed seed count in the plowing treatment. Considering all the soil layers, the decline in the germinating weed seed count was very high in the treatment plots with cover cropping and the application of glyphosate; thus, these are considered to be the best practises to reduce the germinating weed seed count in the soil of coconut plantations.
机译：杂草是椰子种植园中的多年生问题，并导致坚果产量的重大损失。杂草种类繁多，也给根除它们带来困难。评价了五种不同的杂草处理方法对斯里兰卡低郊干旱地区椰子种植园土壤杂草种子库的分布和组成的影响。所施加的处理包括施用草甘膦（N- [膦酰基甲基]-甘氨酸），用葛根粉覆盖农作物，牵引耙，割草和犁耕。除覆盖作物处理外，所有处理均每年进行两次。就减少杂草生物量而言，草甘膦和覆盖作物（葛根）的应用在减少地面杂草种群方面更为有效。这些方法在降低表层土壤杂草种子密度方面非常有效。耕作和耙地工作大大减少了表层土壤的种子库，并使大量杂草种子转移到更深的土壤剖面。但是，与初始发芽的杂草种子相比，发芽的杂草种子总数在10-15、15-20、20-25和25-30 cm的土壤深度分别增加了123.5、691.4、1133.1和1216.5％。算在耕犁中。考虑到所有土壤层，在有覆盖作物和施用草甘膦的处理地中，发芽杂草种子数量的下降非常高。因此，这些被认为是减少椰子种植园土壤中发芽杂草种子数量的最佳方法。

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