Herbicides with natural and synthetic biostimulants in spring wheat

ABSTRACT: Although the knowledge on agricultural using of biostimulants increases, there is still little information on their interactions with other chemicals i.e. herbicides. The aim of the study was to assess the influence of popular herbicides (MCPA + dicamba, dicamba + triasulfuron, florasulam+2,4-D) used with and without biostimulants based on seaweed extract (Kelpak) and nitrophenols (Asahi) on weed control efficiency, yield and quality of the crop. Field trial was carried out in the years 2014 and 2015 in the Institute of Plant Protection - National Research Institute in Poznan (Poland). The experiment was established on spring wheat cv.‘Torridon’, in 4 replications, using randomized block design. In the experiment two variants of application were tested. In the first variant preparations (herbicide and biostimulant) were applied as tank mixtures at the crop growth stage BBCH 30 and in the second variant in some combinations herbicide application was followed by biostimulant used alone. Weather conditions had a profound impact on tested preparations activity. Addition of biostimulants to herbicide had not affected weed control efficacy but application of herbicide and biostimulant mixture revealed its influence on yield parameters of wheat. Biostimulants influenced yield quality parameters e.g. by enhancing gluten amount in grains.

摘要：尽管学界对生物刺激素（biostimulant）的农业应用认知持续深化，但有关其与除草剂等其他化学品交互作用的研究仍较为匮乏。本研究旨在评估三类常用除草剂（MCPA + dicamba、dicamba + triasulfuron、florasulam + 2,4-D）分别配施与不配施基于海藻提取物的生物刺激素（Kelpak）及硝基苯酚类生物刺激素（Asahi）时，对杂草防除效果、作物产量与品质的影响。本试验于2014年至2015年在波兰波兹南植物保护研究所-国家研究院（Institute of Plant Protection - National Research Institute）开展田间研究。试验以春小麦品种‘Torridon’为供试材料，采用随机区组设计，设置4次重复。本次试验共设置两种施药模式：第一种模式下，除草剂与生物刺激素以桶混制剂形式于作物BBCH 30生长阶段施入；第二种模式下，部分组合先施用除草剂，随后单独喷施生物刺激素。天气条件对供试药剂的药效具有显著影响。将生物刺激素添加至除草剂中并未对杂草防除效果产生显著影响，但除草剂与生物刺激素的混配制剂却对小麦的产量性状存在显著调控作用。生物刺激素可改善小麦的籽粒品质，例如提升籽粒中的谷蛋白含量。