纽荷尔和清家脐橙果实大量矿质营养元素含量与累积变化

Study on the Changes of Macro-element Contents and Accumulation in Fruits of Newhall and Seike Navel Orange

在重庆北碚,以30年生枳砧清家脐橙和纽荷尔脐橙为材料,分析果实生长发育过程中N、P、K、Ca、Mg和S等6种大量营养元素含量和累积量变化。结果表明,果实生长发育过程中,纽荷尔和清家果实中N、P、Mg和S含量4月最高,Ca在10月最高,纽荷尔和清家K含量分别在9月和7月最高;Ca的主要累积时期,纽荷尔脐橙果实为6—7月和9—10月,清家脐橙果实为6月、8月和10月;除Ca外的其他大量矿质营养元素累积量较大的时期,纽荷尔和清家脐橙果实的总体上均为6—9月和11月,但清家脐橙累积最高峰一致出现在6月,纽荷尔脐橙累积最高峰至少推迟1个月左右。

Changes of nutrient element contents and accumulations of N, P, K, Ca, Mg and S, in fruits of 30 years-old trees of Seike navel orange （Citrus sinensis Osheek ev Seike） and Newhall navel orange（Citrus sinensis Osbeck cv Newhall）on trifoliate orange（Poncirus trifoliata （L）Raf. ） rootstocks were studied. Results showed that during the fruit development, N, P, Mg and S contents reached the highest levels in April in fruits of both Newhall and Seike. The peak K content appeared in Sept for Newhall navel orange and July for Seike navel orange. The peak Ca contents appeared in Oct for the two varieties. The main accumulation periods of N, P, K, Mg and S in fruits were from July to Sept. for Newhall navel orange, and from June to Aug. for Seike navel orange. The main accumulation period of Ca was from Aug. to Oct. for the two varieties.