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首页> 外文期刊>The Journal of Horticultural Science & Biotechnology >The effect of nitrogen, harvest date and bud size on postharvest yellowing of buds of an early and a late cultivar of Brussels sprout (Brassica oleracea var. gemmifera)
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The effect of nitrogen, harvest date and bud size on postharvest yellowing of buds of an early and a late cultivar of Brussels sprout (Brassica oleracea var. gemmifera)

机译：氮，收获日期和芽尺寸对早熟和晚熟布鲁塞尔芽甘蓝（Brassica oleracea var。gemmifera）的芽收获后变黄的影响

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摘要

A study was made of the effect of nitrogen application shortly before harvest on postharvest yellowing of the buds of an early (cv. Maximus) and a late (cv. Philemon) cultivar of Brussels sprout (Brassica oleracea var. gemmifera). The efficiency of nitrogen application, with the aim of increasing the nitrogen concentration in the outer leaflets of the buds, was higher when nitrogen dissolved in water was directly sprayed over the crop as compared with the conventional broadcast granular fertilizer application. However, there appeared to be no relation between the nitrogen concentration of the outer leaflets of the buds and the time after harvest to reach 25% yellow buds. For both cultivars the rate of postharvest yellowing increased with a delay in harvest and was positively related to the size of the buds. When all data were pooled, it appeared that for the early cv. Maximus the time after harvest to reach 25% yellow buds was negatively correlated with the age of the crop at the time of harvesting. Such a relation was not found for the late cv. Philemon. The age of the buds, and not nitrogen concentration, is likely to be the dominant factor determining postharvest yellowing.
机译：对收获前不久施氮对布鲁塞尔芽菜（Brassica oleracea var.gemifera）早期（cmax。Maximus）和晚期（cv。Philemon）品种的芽采后变黄的影响进行了研究。与传统的撒播颗粒肥料相比，将溶解在水中的氮直接喷洒在作物上时，施氮的效率更高，目的是增加芽的外部小叶中的氮浓度。但是，芽的外部小叶中的氮浓度与收获后达到25％的黄色芽的时间似乎没有关系。对于这两个品种，收获后泛黄的速率随着收获的延迟而增加，并且与芽的大小成正相关。汇总所有数据后，就可以发现早期的简历。收获后达到25％黄芽的最长时间与收获时的作物年龄呈负相关。在后来的简历中找不到这种关系。腓利门。芽的年龄而不是氮的浓度很可能是决定收获后泛黄的主要因素。

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