postemergence

简明释义

英[ˌpoʊstɪˈmɜrdʒəns]美[ˌpoʊstɪˈmɜrdʒəns]

adj. 苗期使用的；农作物出苗后至成熟前的

英英释义

单词用法

同义词

反义词

例句

1.Adjuvants increase postemergence herbicide efficacy, but adjuvant type greatly affects herbicide efficacy enhancement by the adjuvant.

助剂对除草剂有增效作用，但不同类型助剂对除草剂增效作用差别很大。

2.Compounds were sprayed immediately after seed planting (preemergence treatment) or after the expansion of the first true leaf (postemergence treatment).

在播种后(萌前处理)或第一片真叶展开后(萌后处理)立即喷洒化合物。

3.Compounds were sprayed immediately after seed planting (preemergence treatment) or after the expansion of the first true leaf (postemergence treatment).

在播种后(萌前处理)或第一片真叶展开后(萌后处理)立即喷洒化合物。

4.Farmers often apply herbicides during the postemergence 出苗后 stage to control weeds that have already sprouted.

农民常在出苗后阶段施用除草剂，以控制已经发芽的杂草。

5.The postemergence 出苗后 application of fertilizers can significantly boost crop yields.

在出苗后施用肥料可以显著提高作物产量。

6.In postemergence 出苗后 management, monitoring pest populations becomes critical.

在出苗后管理中，监测害虫种群变得至关重要。

7.The effectiveness of certain pesticides is highest during the postemergence 出苗后 phase of crop growth.

某些农药的有效性在作物生长的出苗后阶段最高。

8.Research indicates that postemergence 出苗后 treatments are essential for optimizing plant health.

研究表明，出苗后的处理对于优化植物健康至关重要。

作文

Postemergence weed control is a critical aspect of modern agriculture that focuses on managing weeds after they have emerged from the soil. This timing is essential because it allows farmers to target specific weed species that compete with crops for nutrients, water, and sunlight. The postemergence phase is particularly important in the life cycle of both crops and weeds, as it is during this period that weeds can significantly impact crop yield and quality. Farmers must carefully monitor their fields to determine the right moment for applying herbicides or other control methods during the postemergence stage.In recent years, advancements in agricultural technology have provided farmers with new tools and methods for effective postemergence weed management. For example, precision agriculture techniques allow for the targeted application of herbicides, reducing the amount of chemicals needed and minimizing environmental impact. Additionally, the development of herbicide-resistant crop varieties has revolutionized postemergence weed control strategies. These crops can withstand the application of specific herbicides, enabling farmers to eliminate weeds without harming their crops.However, relying solely on chemical controls during the postemergence phase can lead to challenges such as herbicide resistance. Over time, some weed species may develop resistance to commonly used herbicides, making them harder to control. Therefore, integrated weed management strategies are essential. These strategies combine various methods, including cultural practices, mechanical control, and biological control, along with postemergence herbicide applications to create a more sustainable approach to weed management.Cultural practices, such as crop rotation and cover cropping, can help suppress weed growth during the postemergence phase. By rotating crops, farmers can disrupt the life cycles of weeds and reduce their populations. Cover crops can also provide ground cover that competes with weeds for resources, thereby minimizing their growth.Mechanical control methods, such as tillage and mowing, can be employed during the postemergence stage to physically remove weeds. While these methods can be labor-intensive, they can be effective in reducing weed competition without the use of chemicals. Moreover, biological control involves using natural predators or pathogens to manage weed populations, providing an eco-friendly alternative to traditional herbicides.In conclusion, postemergence weed management is a vital component of successful agricultural practices. By understanding the dynamics of weed competition during this phase, farmers can implement effective control strategies that enhance crop productivity and sustainability. The integration of various methods, including chemical, cultural, mechanical, and biological approaches, will ensure that postemergence weed control remains effective in the face of evolving challenges such as herbicide resistance. As the agricultural landscape continues to change, adapting our strategies for postemergence weed management will be crucial for maintaining food security and environmental health.

后出芽杂草控制是现代农业中的一个关键方面，主要关注在杂草从土壤中出现后进行管理。这个时机至关重要，因为它使农民能够针对与作物争夺营养、水分和阳光的特定杂草种类。在作物和杂草的生命周期中，后出芽阶段尤其重要，因为在此期间，杂草可能会显著影响作物的产量和质量。农民必须仔细监测他们的田地，以确定在后出芽阶段施用除草剂或其他控制方法的最佳时机。近年来，农业技术的进步为农民提供了新工具和方法，以有效管理后出芽杂草。例如，精准农业技术允许对除草剂进行针对性施用，从而减少所需化学品的数量，并最小化对环境的影响。此外，除草剂抗性作物品种的发展彻底改变了后出芽杂草控制策略。这些作物能够承受特定除草剂的施用，使农民能够消灭杂草而不伤害他们的作物。然而，仅仅依赖化学控制在后出芽阶段可能会导致一些挑战，例如除草剂抗性。随着时间的推移，一些杂草种类可能会对常用除草剂产生抗性，从而使其更难以控制。因此，综合杂草管理策略是必不可少的。这些策略结合了多种方法，包括文化实践、机械控制和生物控制，以及在后出芽阶段施用除草剂，以创造一种更可持续的杂草管理方法。文化实践，如轮作和覆盖作物，可以帮助抑制在后出芽阶段的杂草生长。通过轮换作物，农民可以打乱杂草的生命周期并减少其种群。覆盖作物还可以提供地面覆盖，与杂草争夺资源，从而最小化其生长。机械控制方法，如耕作和修剪，可以在后出芽阶段被用来物理去除杂草。虽然这些方法可能需要大量劳动力，但它们在不使用化学品的情况下有效减少杂草竞争。此外，生物控制涉及使用自然捕食者或病原体来管理杂草种群，为传统除草剂提供了一种环保的替代方案。总之，后出芽杂草管理是成功农业实践的重要组成部分。通过理解在这一阶段杂草竞争的动态，农民可以实施有效的控制策略，提高作物生产力和可持续性。将包括化学、文化、机械和生物方法在内的各种方法整合在一起，将确保后出芽杂草控制在面对诸如除草剂抗性等不断演变的挑战时仍然有效。随着农业格局的不断变化，调整我们对后出芽杂草管理的策略对于维护粮食安全和环境健康至关重要。