为诊断和防止硼的危害,需要了解硼危害的症状及其临界值。本文在于说明过量施用硼肥对春大麦生长的影响。用盆栽试验,测定了春大麦在营养生长期(即Feekes所提出的麦类生长期的第7～8阶段,以下简称为:Feekes 7～8级。译注)受硼毒害和植株中含硼量之间的关系,即硼毒害作物的临界值。同时还测定了春大麦明显减产时, To diagnose and prevent the hazards of boron, you need to understand the symptoms of boron damage and its critical value. The purpose of this article is to show the effect of excessive application of boron on the growth of spring barley. Pot experiments were conducted to determine the effects of boron toxicity and the amount of boron in plants during the vegetative growth stage of spring barley (ie, stages 7-8 of the wheat growth stage proposed by Feekes, hereinafter referred to as Feekes 7-8) The relationship between the boron poisoning crops critical value. At the same time also measured significantly reduced spring barley production,