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拟通过田间试验,调查不同钾肥用量在氮、磷、钙、镁不同肥料配合下,对苹果果实色泽、养分元素含量及果皮色素的影响。供试树为9年生富士,八棱海棠为砧木,试验以N-P、N-P-Mg、N-P-Ca 3种肥料配合为基础,与每株0~2000克的K2O配合施用,测定果实着色度、花青素、叶绿素、类胡萝卜素、果实和土壤中的主要矿质元素含量。在3种肥料配合中,果实着色度均随钾肥用量的增加呈先提高后降低的变化趋势,3种配合的果皮类胡萝卜素含量均
Field experiments were conducted to investigate the effects of different amounts of potash fertilizer on the color, nutrient content and peel pigment of apple fruit under the cooperation of different nitrogen, phosphorus, calcium and magnesium fertilizers. The test trees were 9-year-old Fuji and 8-begonia rootstocks. The experiment was based on the NP, NP-Mg and NP-Ca fertilizers and was used in combination with 0-2000 g K2O per plant. The color, The content of major mineral elements in the chlorophyll, chlorophyll, carotenoids, fruits and soils. In the three kinds of fertilizers, the shading degree of the fruits increased first and then decreased with the increase of the potassium application rate. The contents of carotenoids