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Response to Application and Tissue Diagnosis of Boron Deficiency and Toxicity in Maize
Communications in Soil Science and Plant Analysis ( IF 1.3 ) Pub Date : 2021-08-29 , DOI: 10.1080/00103624.2021.1971691
Lenir Fátima Gotz 1 , F. Silvestrin 1 , A. C. V. Motta 1 , V. Pauletti 1
Affiliation  

ABSTRACT

The experiments were conducted to verify the effect of doses and application time of boron (B) in the grain yield of maize and to study different plant tissues as a nutritional diagnosis tool for B. Six doses of B (0, 1, 2, 3, 4 and 12 kg ha−1) and two application times (before at sowing and V6 growth stage) were tested. In the first growing season, the B doses and application time did not influence yield components of maize. While the second growing season, B application reached maximum grain yield with 5.0 kg ha−1 at sowing, but at a high dose provided toxicity causing injuries in the cobs. In general, the B content in the leaf at flowering stage was higher with the application at V6 growth stage. B content and distribution in the leaves close to the cob vary with the rainfall that occurs before to the collection, harming the definition of the critical leaf level. The B content in the silk can be a reliable alternative for checking the deficiency or toxicity of this nutrient in the plant, presenting critical level for deficiency (calculated) of 23.2 mg kg−1 while values above 31.5 mg kg−1 can be considered toxic.



中文翻译:

玉米缺硼与中毒的应用及组织诊断反应

摘要

进行实验以验证硼 (B) 的剂量和施用时间对玉米籽粒产量的影响,并研究不同的植物组织作为 B 的营养诊断工具。 六种剂量的 B (0, 1, 2, 3 、 4 和 12 kg ha -1 ) 和两次施用时间(播种前和 V6 生长阶段)进行了测试。在第一个生长季,B 剂量和施用时间不影响玉米的产量构成。在第二个生长季节,B 施用达到最大谷物产量,达到 5.0 kg ha -1在播种时,但在高剂量时会产生毒性,导致玉米棒受伤。总体而言,开花期叶片中B含量较高,V6生育期施肥。靠近穗轴的叶子中 B 的含量和分布随收集前发生的降雨而变化,从而损害了临界叶子水平的定义。蚕丝中的 B 含量可以作为检查植物中该营养素缺乏或毒性的可靠替代方法,其缺乏(计算)的临界水平为 23.2 mg kg -1而高于 31.5 mg kg -1 的值可被认为是有毒的.

更新日期:2021-10-15
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