宁夏日光温室甜樱桃氮钾施肥对产量的影响

The Effect of N & K Fertilization on Sweet Cherry in Ningxia Heliogreenhouse

摘要: 针对宁夏北部地区土壤盐碱含量高，大樱桃适生性差、产量低、施肥不合理的问题，采用N、K二因素二次D-饱和最优设计，在宁夏贺兰园艺产业园科研开发区日光温室中进行施肥试验，研究了N、K配施对4年生甜樱桃初果期产量的影响，建立N、K施肥量与目标产量形成的二元二次数学函数回归模型，优化施肥量及N、K配比，以期为今后大樱桃科学合理施肥提供技术支撑。结果表明：在试验范围内，产量随N肥施肥量增加而增加，随钾肥施肥量增加则呈现出先增加后降低趋势。甜樱桃适宜的氮钾施肥比例约为1.35:1，最佳N、K施肥量分别为2.12 kg、1.57 kg，适宜的N肥施肥量区间为2.05~2.5 kg，适宜的K肥施肥量区间为0.9~1.65 kg。

Abstract: In view of the high saline-alkali content in soils in northern Ningxia, poor cherry adaptability, low yield, and unreasonable fertilization, the two-factor two-equation D-saturated optimal design was used, the effect of N&K fertilization on sweet cherry was researched in Ningxia Heliogreenhouse of the scientific research development zone of Helan Horticultural Industry Park. The mathematical function regression model of N & K fertilization amount and target yield was established, and the optimum fertilizer amount and N & K ratio were optimized. The results showed that within the range of experiment, the yield increased with the increase of N fertilizer amount, and then in-creased first and then decreased with the increase of K fertilizer amount. The analysis shows that the sweet cherry suitable nitrogen and potassium fertilization ratio is about 1.35:1, the best N, K fertilization amount were 2.12 kg, 1.57 kg, the suitable N fertilizer fertilization range is 2.05 - 2.5 kg and the suitable K fertilizer fertilization range is 0.9 - 1.65 kg.