Abstract

The aim of the research was to compare the effectiveness of the differentiated and uniform application of herbicides on winter wheat crops in the northwest region of the Russian Federation. According to the research results, a stable positive correlation was found in the stemming phase of winter wheat between the NDVI vegetation index and the projective cover (r = 0.32–0.61, p ≤ 0.05) but not with the number of weeds (r = –0.18–0.35). Despite this, the actual values ​​of this index did not make it possible to reliably distinguish different degrees of weediness in plots in the experiment in all cases. The higher biological and economic efficiency of the uniform application in comparison with the differentiated application of the herbicide in winter wheat crops was shown. In this variant, weeds were destroyed, including those on plots with low infestation, which were not treated with the differential application of the herbicide. At the same time, differentiated herbicidal treatment contributed to a significant decrease in the volume of drug use. The herbicide consumption rate differentiated on the basis of measurements of the NDVI index turned out to be as effective in influencing the number and phytomass of weeds as the total rate.

中文翻译：

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冬小麦作物除草剂差异化施用的效果

摘要

该研究的目的是比较俄罗斯联邦西北地区冬小麦作物上除草剂的差异化和均匀施用效果。据研究结果，有稳定的正相关性在冬小麦的NDVI植被指数和投影盖之间的词干相被发现（[R = 0.32-0.61，p ≤0.05），但不与杂草（数ř= –0.18–0.35）。尽管如此，该指数的实际值仍无法在所有情况下可靠地区分实验中不同程度的杂草程度。结果表明，与除草剂在冬小麦作物中的差异施用相比，统一施用具有更高的生物学和经济效率。在这个变体中，杂草被破坏，包括那些没有受到不同除草剂处理的低侵害性地块上的杂草。同时，差异化的除草处理大大减少了药物使用量。结果表明，根据NDVI指数的测量结果得出的除草剂消耗率与总消耗率一样有效。