温室杏叶片矿质营养元素含量周年动态变化研究

Annual Variation of Mineral Nutrients in Leaves of Apricot in the Greenhouse

以‘国之鲜’杏为材料,在温室栽培条件下,研究叶片矿质元素含量周年变化规律,从而为温室栽培杏适期施肥提供理论依据。结果表明:温室栽培条件下,矿质元素含量的周年动态呈现一定规律性,具体表现为叶片N、P、K、B的含量呈前期高、后期低的趋势,Ca和Fe相反,Mg含量呈先上升、后下降的趋势;3月20日至4月5日可推荐为叶片分析营养诊断的适宜时期。从营养元素的余缺情况看,叶片N含量稍高;磷含量超高,应严格控制。

Taking 'Guozhixian'apricot as the material,under cultivation conditions in solar greenhouse,the seasonal changes on mineral element contents in blades were studied,thus providing theoretical basis for fertilization in suitable period of greenhouse cultivation of apricot.The results show that,under cultivation conditions in solar greenhouse,the seasonal trend of mineral element contents has certain regularity,specially representing that the contents of N,P,K,and B in blades are high in earlier stage and low in later stage.In addition,the trends of Ca and Fe are opposite and contents of Mg increase first and then decrease;The period from March 20 to April 5 is recommended as the proper period to analyze nutrition diagnosis for blades.According to the surplus and deficiency of nutrient elements,the N content in leaves is slightly higher;The phosphorus content is extremely high and should be strictly controlled.