野生欧李生长期矿质营养元素含量的变化

 研究野生欧李叶、花和果实中矿质营养元素(Cu、Zn、Fe、Mn、Ca、Mg、K)含量生长期动态变化规律及其相关性。结果表明，欧李开花期是矿质营养元素吸收、累积最关键的时期，从始花期至终花期，Fe、Ca、Mn元素呈极显著增加，其它元素无明显增减；果实进入生长发育阶段，7种矿质营养元素含量变化表现为前期营养元素含量较高，后期营养元素含量较低，并呈“下降—平缓(上升)—下降”的趋势，除K元素外，其它6种矿质营养元素含量变化相互间均达到显著或极显著正相关；欧李叶、果间Ca和Mg元素达极显著负相关，zn元素达极显著正相关，其它元素相关性均不显著。果实中7种矿质营养元素含量(均值)的大小顺序为：K>Ca>Mg>Fe>Zn>Mn>Cu。

Change of Mineral Nutrient Elements Content in Growing Period of Cerasus humilis

The changes of content of several mineral nutrient elements, including Cu, Zn, Fe, Mn, Ca, Mg, K in leaves, flowers and fruits of Cerasus humilis growing period were analyzed with an atomic absorption spectrophotometer and the correlation among the changes of these elements was also studied. The result showed that the flowering phase of Cerasus humilis was the key period for the absorption and cumulation of mineral nutrient elements. In the whole phase from start to end, the increase of content of element Fe, Ca, Mn was remarkable, but there was no evident increase or decrease for that of other elements. After flowering phase, the content of seven mineral elements keep high in former period and low after that. There appeared a changing trend of descend-plane (ascend ) -descend in content of all seven mineral element. There was a significant positive linear relationship of content of 6 elements in flower and fruit of Cerasus humilis, except element K. When compared with that in leaves, only Ca and Mg had a significant positive linear relationship, Zn had a significant negative linear relationship and there were no significant correlation in that of other elements. The sequence of 7 elements by the average content in fruit was K > Ca > Mg > Fe > Zn > Mn > Cu.