But in the distribution of our country, oak trees are widely distributed in the north and kapok is widely distributed in the south, so in the geographical distribution of our country, they do not grow together.
1. Oak
(1) Oak (also known as Quercus or Quercus) is a general term for FAGACEAE plants, including Quercus, Cyclobalanopsis and Cladocera, usually referring to Quercus, not a specific tree species. There are 6 15 species of Quercus, of which 450 species are from Quercus subgenus, and 188 is Quercus subgenus. Its fruit is called acorn, and its wood is generally called oak. Oak is the largest flowering plant in the world; Life is very long, it has a life span of 400 years. The fruit is nuts, hairy at one end and bare at the other end, which is beautiful and delicious (people generally don't eat it). It is the first-class food for squirrels and other animals. It is found that a Jurupa oak tree in California, USA has survived for at least 6.5438+0.3 million years, which may be the oldest known creature in the world. Xinhua News Agency, April 30, 2006, at 5438+0, the American Arbor Day Foundation recently announced that the oak tree was selected as the national tree of the United States through public network voting.
(2) Oak trees have strong resistance to stress, dryness, high temperature and humidity, frost and urban environmental pollution, and strong wind resistance. They like well-drained soil, but they can also grow in cohesive soil. Oak likes sandy loam or slightly acidic soil with good drainage, is resistant to environmental pollution and has strong adaptability to barren, arid, acidic or alkaline soil. Oak grows at a moderate speed, growing 60 cm high on wet and well-drained soil every year.
(3) Oaks are mainly distributed in Portugal, China, Liaoning, Xiong Yue, Beijing, Tai 'an, Qingdao, mountainous areas in western Hebei, Changyang, Hubei and Henan. Ankang has cultivation.
2. kapok
(1) kapok, also known as Panzhihua, red cotton tree, sparse cotton, hero tree, northern Hebei, bonfire, mottled branch and qiongzhi, is a deciduous tree growing in tropical and subtropical areas, with a height of 10-25m. The bottom of the trunk is densely covered with thorns to prevent animals from invading. Branches alternate and leaves alternate. Although the trunk of kapok is thick, the wood is too soft and useless. The origin of these trees is unknown, but they may have originated in India. It is widely planted in South China, Taiwan Province Province, Indochina Peninsula and Nanyang Islands with immigrants.
(2) At present, the distribution of kapok in China starts from Jinsha River in Panzhihua, Anning River, Yalong River Basin in southwest Sichuan, Jinsha River Basin in Yunnan, southern Yunnan and southern Guizhou, and ends in Guangdong, Guangxi, southern Fujian, Hainan and Taiwan Province Province.
(3) Keep the soil moist at the seedling stage of kapok, and apply fertilizer once a month. A certain humidity is also needed between flowering and leaf opening. Adult plants have strong drought tolerance and should be kept slightly dry when defoliation occurs in winter. Pests and diseases include anthracnose, spot disease, scale insect, whitefly and so on. It can prevent and treat symptoms.