不同钾肥用量对绿芦笋产量及营养品质的影响

2009年3—7月在西辽河平原的内蒙古民族大学实验农场，以5年生芦笋‘阿波罗’(Asparagus officinalis L. ‘Apollo’)为试材，研究不同钾肥用量对绿芦笋产量及营养品质的影响。结果表明，施钾量在0~375 kg/hm2的范围内，随着钾肥用量的增加绿芦笋产量及单支重均呈先升高后降低的趋势，其中产量以钾肥用量300 kg/hm2处理最高，单支重以钾肥用量225 kg/hm2处理最高，绿芦笋支数随着钾肥用量的增加呈逐渐增加的趋势。可溶性蛋白含量各时期均随着钾肥用量的增加逐渐增加，可溶性糖含量前期、中期呈先升高后降低的趋势，其中前期以施钾225 kg/hm2最高，中期以施钾300 kg/hm2处理最高，后期呈逐渐增加的趋势。粗蛋白含量随着钾肥用量的增加逐渐增加，其他营养成分变化不大。Ca、Mg元素随钾肥用量的增加逐渐降低，其他矿质元素与钾肥用量的关系不明显。在试验条件下，结合产量及营养品质，绿芦笋适宜施钾量为300 kg/hm2。

Effects of Different amount of Potassium Fertilizer on Yield and Nutrient Quality of Green Asparagus

In experimental farm of Inner Mongolia University for Nationalities from March to July in 2009, using five-year Asparagus officinalis L. cv.Apollo as experimental material, we studied the effects of different amount of potassium fertilizer on yield and nutrient quality of green asparagus. The results are as the following: the yield of green asparagus and the weight of per branches of green asparagus is the first increase after decreasing trend with the increase of the amount of potassium fertilizer when the amount of potassium fertilizer is within 0-375kg hm-2. And the yield and the weight of per branches is the highest when the amount of potassium fertilizer is respectively 300 kg hm-2 and 225 kg hm-2; the number of green asparagus goes up with the increase of the amount of potassium fertilizer. The content of soluble protein at each stage is gradually increased with the increase of the amount of potassium fertilizer. The content of soluble sugar in the early and middle increase first and then decrease of which the highest is the amount of potassium fertilizer of 225 kg hm-2 in the early , is the amount of potassium fertilizer of 330 kg hm-2 in the middle, gradually increase in the late. The content of crude protein goes up with the increase of the amount of potassium fertilizer and other nutritional content have no obvious change. Ca, Mg elements gradually decreased with increasing potassium fertilizer and other mineral elements with no obvious relation of potassium fertilizer. Under this experimental condition, the combination of yield and nutrient quality, the amount of potassium fertilizer of 300 kg hm-2 is appropriate for green asparagus.