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为了解重庆三峡库区奉节县脐橙树体营养状况,2010—2013年对该县7个主产乡镇的191个脐橙园的当年生春梢营养枝叶片营养元素含量进行了分析。结果表明,树体营养元素失衡较严重。总体上,在叶片大中量元素中,N含量充足且以过剩(偏高或过量)为主,过剩比例为58.11%;P含量以适宜和偏高为主,比例分别为59.16%和31.94%;K含量以偏低为主,含量不足(缺乏或者偏低)的比例为56.03%;Ca含量以适宜和过剩为主,比例分别为62.83%和30.89%;Mg和S含量不足的比例分别为31.94%和26.70%。在微量元素中,Fe含量最为丰富,含量不足的比例仅5.76%;Mn和B处于适宜范围的果园比例也较高,分别为70.68%和62.07%;Zn含量最为缺乏,含量不足的比例高达82.20%;Cu含量不足的果园也较高,占51.84%。奉节脐橙生产上应该重视补充锌肥,适量补充钾、镁和铜肥。
In order to understand the nutritional status of navel orange tree in Fengjie County, Chongqing Three Gorges Reservoir Area, the nutritional element contents of the vegetative shoots in 191 navel orange orchards in 7 main producing townships in 2010 were analyzed. The results showed that the disequilibrium of tree nutrition elements was more serious. In general, the content of N was abundant and excess (high or excessive) in the middle and large amount of leaves, the excess ratio was 58.11%; the content of P was moderate and high, with the proportions of 59.16% and 31.94% ; The content of K is mainly low and the content is less (lack or low), the ratio is 56.03%; the content of Ca is mainly suitable and surplus, the proportions are 62.83% and 30.89% respectively; the proportion of Mg and S is insufficient 31.94% and 26.70%. In the trace elements, the content of Fe is the most abundant and the content is less than 5.76%. The proportions of orchards with Mn and B in the suitable range are also higher, which are 70.68% and 62.07% respectively. The content of Zn is the most lacking and the content is less than 82.20%. %; Orchards with insufficient Cu content are also higher, accounting for 51.84%. Fengjie navel orange production should pay attention to zinc supplementation, appropriate amount of potassium, magnesium and copper fertilizer.