花叶萝卜新品种CR捷如春4号

萝卜消费量在蔬菜中名列前茅,尤其是花叶类型萝卜以含水量大、口感好、适宜煲汤出名。CR捷如春4号是北京捷利亚种业有限公司选育的花叶新品种,经过河北、湖北等地多年试验,表现根形美观、品质好、耐抽薹性较好、有一定抗根肿病的能力,适宜南北方春季、高冷地夏季栽培,大部分地区秋季及秋冬也可种植。1特征特性花叶品种,植株半开展,叶色深绿,叶片中等大小;根长28~30 cm,根径7~8 cm,

花叶萝卜新品种捷如秋

萝卜种植历史悠久,大家族中成员很多,其中半板半花型萝卜受到消费者广泛认可,其表皮洁白、尾部圆润、根形美观,适合现代小型家庭食用,如北京捷利亚种业的捷如美、北京世农公司的Cr301等,但因消费习惯不同,长江以南地区更喜欢花叶型萝卜的口感。基于此,北京捷利亚种业有限公司选育出捷如秋品种。该品种在河北、湖北、山东等地进行3年试验.

Determination and Comparison of Pigment Contents in Leaves of Punica granatum L. Hybrids with Different Leaf Colors

[Objective] This study aimed to investigate the reason for the different leaf colors of pomegranate hybrid progeny. [Method] Spectrophotometry was used to determine the contents of three pigments, including chlorophyll, carotenoid and anthocyanin, in the leaves of eight pomegranate individuals and their parents at growth stage. [Result] The results showed that during the early growth stage, the anthocyanin contents of four pomegranate individuals with red leaves were higher than the control, to be specific, the anthocyanin content of No.5 pomegranate individual reached the highest of 4.12 mg/g; the chlorophyll and carotenoid contents of four pomegranate individuals with yellow-green leaves showed consistent dynamic trends with the control, to be specific, the chlorophyll content and chlorophyll/carotenoid ratio of No.4 pomegranate individual reached the highest, while the chlorophyll a/carotenoid b ratio of No.3 pomegranate individual was the lowest. During vigorous growth stage, the contents of chlorophyll, carotenoid and anthocyanin of eight pomegranate individuals showed consistent dynamic trends, with no significant difference with the control. Analysis of variance indicated that there were significant differences in the contents of chlorophyll and carotenoid among different pomegranate individuals at different growth stages and in the content of anthocyanin among different pomegranate individuals, while no significant difference was observed in the chlorophyll/carotenoid ratio among different pomegranate individuals at different growth stages. [Conclusion] The differences in leaf colors among pomegranate hybrid progeny are caused by different contents and ratios of anthocyanin and chlorophyll at growth stage.

Effect of Nutrimental Stress on the Pigment Content of the Heliophytic Poinsettia （Euphorbia Pulcherrima cv. Valenciana）

Nutrimental requirements of heliophytic poinsettias have not yet been determined, this information is essential for developing an adequate technological package to orient producers in its management. The behavior of the plant under nutritional stress needs to be known by the application of a hydroponic system. The objective of the present work was to evaluate the physiological effect of induced deficiencies of five macronutriments （nitrogen, phosphorous, potassium, calcium, and magnesium） and its influence on the pigment production of the poinsettia Euphorbia puleherrima cv. ＂Valenciana＂. The study was made during 2010 at the Research Unit ＂Dr. Ramon Fernandez Gonzalez＂ in Texcoco, State of Mexico. Six treatments were tested during 240 days from transplant in a totally randomized experimental design. Chlorophylls contents were determined at the beginning of the experiment. At the end of the treatment period, the contents of nutrients, chlorophylls, leaf carotenoids and bract anthocyanins were determined. The effects observed as results of the treatments were： reduction in plant height and diameter; the lowest content of total chlorophylls was observed in the absence of nitrogen, the largest reduction being of chlorophyll a and carotenoids; a low content of anthocyanins was observed to be associated with low nitrogen and calcium; a high correlation was found between nitrogen supplementation and measured non-destructively with a SPAD 502 Minolta unit values measured intensity of green color of leaves.