论文部分内容阅读
胡萝卜吸氮量与播后天数呈直线相关,吸磷钾量与播后天数呈Logistic生长曲线。苗期吸磷钾量相对高于吸氛量。施用氮肥的利用率为24.9%,磷肥利用率为15.7%,钾肥的利用率为16.6%。每生产1000kg胡萝卜需吸收氮素3.53kg,五氧化二磷1.52kg,氧化钾6.94kg。获得高产量亩施氮素10kg,五氧化二磷5kg,氧化钾15kg,亩密度2.7~2.8万株。亩产4200kg以上的综合农艺措施为亩施氮素8.1~8.2kg,五氧化二磷4.5~5.4kg,氧化钾14.3~16.5kg,亩密度2.7~2.8万株。影响胡萝卜产量的因素主次顺序为:密度>钾用量>磷用量>氮用量。
The nitrogen uptake of carrot was linearly correlated with the days after sowing, and the logarithm of P uptake and days after sowing showed Logistic growth curve. Potassium phosphorus intake at seedling stage is relatively higher than the amount of suction. The utilization rate of nitrogen fertilizer was 24.9%, the utilization rate of phosphate fertilizer was 15.7% and the utilization rate of potassium fertilizer was 16.6%. Each production of 1000kg carrots need to absorb nitrogen 3.53kg, phosphorus pentoxide 1.52kg, potassium oxide 6.94kg. Access to high-yielding acres of nitrogen fertilizer 10kg, phosphorus pentoxide 5kg, potassium 15kg, mu density of 2.7 to 28,000. The comprehensive agronomic measures of more than 4200 kg per acre are 8.1 ~ 8.2kg of mu nitrogen, 4.5 ~ 5.4kg of phosphorus pentoxide, 14.3 ~ 16.5kg of potassium oxide, and the density of mu is 2.7 ~ 2 Eighty thousand. The main factors affecting the yield of carrot were as follows: density> potassium content> phosphorus content> nitrogen content.