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任何一种作物当缺乏某种营养元素时,都会产生缺素症。不同作物对营养元素的需求是各不相同的,而且数量差异也很大。即使缺同一营养元素,但不同作物的表现症状也极不相同。因此,营养诊断必须根据不同作物、生育时期、植株部位、土壤状况及环境条件等来进行。才能对作物的营养状况做恰当地判断,进而为合理施肥提供可靠依据。本文根据国内外资料,对甜菜缺素植株表现、植株体内及土壤耕层各元素的临界指标及怎样合理施肥综述如下,供参考。
Any kind of crop lacking a nutrient element produces a deficiency. The demand of different crops for nutrients is different, and the quantity varies greatly. Even without the same nutrients, different crops show very different symptoms. Therefore, nutrition diagnosis must be based on different crops, growth period, plant parts, soil conditions and environmental conditions and so on. In order to properly judge the nutritional status of crops, and thus provide a reliable basis for rational fertilization. Based on the domestic and foreign data, this paper gives a summary of the critical indicators on the performance of sugarbeet lacking plants, the individual elements in plant and soil tillage, and the rational fertilization.