Blackberry is generally considered as the first fruit containing selenium, and the selenium in blackberry belongs to the active organic selenium unique to natural plants. Generally, every 100g blackberry contains selenium 1 10-270 micrograms. Blackberry is native to temperate regions of Europe and has strong adaptability. Institute of Botany, Chinese Academy of Sciences first introduced it to China on 1986, and now it has been introduced and cultivated in China, Jiangsu and other places. Blackberry likes warmth, is afraid of high temperature and is cold-resistant.

Blackberry, a deciduous vine shrub of Rubus in Rosaceae. Blackberry branches are arched or climbing, and the branches often take root at the touch; Leaflets are broadly elliptic, the apex is obtuse, the base is broadly wedge-shaped or nearly round, and the leaf margin is coarsely serrated; Leaflets with short stems; Racemes are terminal; Petals are white, pink or red, and anthers are purple; Aggregate fruit is nearly spherical, black or dark purplish red, and hairless.

Growth habit

Flowering in May-June; The fruiting period is July-August. Blackberry flowers are bisexual and can pollinate themselves. Generally, the yield of fruiting branches is the highest at the height of 60- 150 cm above the ground. Plant life is about 13- 15 years. 1 year with a small amount of fruit setting, the growth period and full fruit setting period in the third to eighth year, and the yield reached the peak. 9- 10 began to enter the period of fruit disappearance and withering.

The underground part of blackberry is composed of rhizome and adventitious roots, which are mainly distributed in the soil layer of 10-30 cm, and some species can grow to the depth of 100 cm. Rhizomes and adventitious roots extend from the center of the shrub base to the periphery, and the maximum density is within the radius of 50 cm.

Above content reference: Baidu Encyclopedia-Blackberry