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首页> 外文期刊>Australian Journal of Crop Science >Effects of Boron (B) doses and forms on boron use efficiency of wheat
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Effects of Boron (B) doses and forms on boron use efficiency of wheat

机译：硼（B）剂量和形态对小麦硼利用效率的影响

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Boron is one of the most limiting micronutrients in the grain production system in Brazil, mainly due to its complex dynamics in thesoil-plant system. In this way, the objective of this study was to evaluate the efficiency of application forms and doses of boron withemphasis on wheat grain yield. The experiment was conducted in no-tillage system in an Oxisol with clay texture in Selvíria, MS.The experimental design was a randomized block design with four replicates arranged in a 4 x 3 factorial scheme, using four dosesof boron (0, 1, 2 and 4 kg ha -1 ) with boric acid source (B = 17%); and three apllication forms: (A1) in desiccation of the predecessorstraw, along with herbicide; (A2) at the time of sowing, in soil along with the formulated fertilization seeding and (A3) foliarapplication along with the syrup of the herbicide (with the application of post emergent herbicide). The increase in boron dosesreduced the recovery of apparent boron (RAB), boron uptake efficiency (BUpE) and agronomic efficiency (AE), but the applicationof 2 kg ha -1 provided the highest boron utilization efficiency (BUtE) and wheat grain yield. We recommend application of 2 kg ha -1of B in the soil at sowing to obtain approximately 4311 kg ha -1 of wheat.
机译：硼是巴西谷物生产系统中最有限的微量元素之一，主要是由于其在土壤-植物系统中的复杂动态。通过这种方式，本研究的目的是评估施用形式和硼剂量对小麦籽粒产量的影响。该实验在密西西比州Selvíria的带有粘土质地的Oxisol的免耕系统中进行。实验设计是随机分组设计，以4 x 3析因方案布置四次重复试验，使用四剂硼（0，1，2和4 kg ha -1）与硼酸源（B = 17％）;以及三种增生形式：（A1）与除草剂一起用于前稻草的干燥; （A2）在播种时，与配制的施肥播种一起在土壤中播种，以及（A3）与除草剂的糖浆一起叶面施用（在出苗后使用除草剂）。硼剂量的增加降低了表观硼（RAB），硼吸收效率（BUpE）和农艺效率（AE）的回收率，但施用2 kg ha -1可提供最高的硼利用效率（BUtE）和小麦籽粒产量。我们建议在播种时在土壤中施用2 kg ha -1的B，以获得约4311 kg ha -1的小麦。

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