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以设施辣椒为试材,采用钾肥不同梯度施用量的方法,研究了钾肥施用量对设施辣椒的生长指标、产量及施用效益的影响,以期为宁夏设施辣椒高效生产提供理论依据。结果表明:当氧化钾施用量低于300kg·hm~(-2)时,钾肥对设施辣椒的生长有一定促进作用,增施钾肥增产效果明显;钾肥用量与辣椒产量之间呈现抛物线分布,当氧化钾施用量低于300kg·hm-2时,辣椒产量随钾肥用量的增加而增加。该地区最高产量氧化钾施用量为315.4kg·hm~(-2),综合分析钾肥价格及辣椒价格,得出最大经济效益氧化钾施用量为177.5kg·hm~(-2)。
The effects of potassium fertilizer on growth index, yield and application benefit of hot pepper were studied using hot pepper as test material and different gradient application rate of potassium fertilizer. The purpose was to provide theoretical basis for high efficiency pepper production in Ningxia. The results showed that potassium fertilizer had a certain promotion effect on the growth of chili pepper when the potash fertilizer was less than 300 kg · hm -2, and the yield increase was obvious with the increase of potassium fertilizer. The distribution of potash fertilizer and chili fertilizer showed a parabola distribution. When the amount of potassium oxide is less than 300kg · hm-2, the yield of pepper increases with the increase of potassium dosage. The highest potassium oxide output in this area was 315.4kg · hm -2. According to the comprehensive analysis of the price of potash fertilizer and the price of pepper, the maximum economic benefit of potassium oxide was 177.5kg · hm -2.