松树种类2（Pine species 2）.doc

松树种类2（Pine species 2） Pine (pine) evergreen trees, a few shrubs. The bark is scaly, needle shaped leaves, spherical fruit, seeds are called pine (pine nut) can eat. Wood and resin have a wide range of uses. Pine trees are more than 100 varieties in the world, is full of positive fast-growing species, except some shade to seedlings during the growing period, the love light and fertile moist soil. The original local varieties of Huashan province with pine, Chinese pine, Pinus bungeana, Pinus massoniana, Pinus henryi and Du Song, from home and abroad to introduce the varieties of larch, pine, cedar, Yunnan pine, Pinus elliottii, etc.. These trees differ in their biological properties, while others prefer warm and humid climates, while others prefer mild, cold climates. Some Hardy, drought resistant, and some are not hardy, afraid of drought. The range of suitable cultivation of pine trees is introduced. L, also known as the white pine, Huashan pine five pine in Qinba mountainous area, Weibei some mountainous and hilly can be cultivated, the annual average temperature at 15 DEG C, the annual precipitation in the 600 - 1500 mm. Strong adaptability to the soil, can be grown in the mountain soil, red soil, red calcareous soil. But the soil moisture more stringent requirements, not resistant to drought and barren, less alkali resistance and poor drainage. Huashan pine is more hardy and can grow normally at subzero temperatures of minus 7 - 10 C, and can grow at an absolute low temperature of up to 31 degrees C. Huashan pine tree tall, green needles, cones numerous, but also green garden, ornamental and nutritious, delicious dried fruit trees. 2, masson pine, fir or pine is the main tree species in subtropical, can only be planted in the southern slope of Qinling Mountains Bashan and some places. Suitable for warm and humid climate, the annual average temperature of 13 - 22 degrees, the annual precipitation of more than 800 millimeters growing. Intolerant of low temperatures