Torreya grandis, belonging to Taxaceae, is a unique woody oil tree species in China, and its fruit is a famous dried fruit.
Seed oil is a good edible oil. Torreya grandis can be used as medicine, which has the effects of relieving cough, moistening lung, eliminating hemorrhoids and expelling ascaris. Torreya grandis bark contains 3%~6% tannin, which can be used to extract industrial tannin extract. Torreya grandis oil can be extracted from the aril of torreya grandis fruit. Torreya grandis extract can also be used to make cosmetics. 20 14 was identified as Shaoxing tree.
Management and Maintenance of Torreya grandis
After planting 1 year, the key point of tending management is to do a good job in drought resistance and seedling protection in high temperature weather in summer. Torreya grandis is easy to get sunburned, so it is necessary to build a shade shed to shade the sun. Mesh material is suitable for shading shed, which can not only shade, but also have certain transparency. The construction time is in early April. In winter, in order to prevent frostbite, weeds can be covered on the roots of seedlings to keep warm during the second tending. At the end of winter, the plastic film should be buried in the soil in time to prevent the infection of pests and diseases, and at the same time, it can play the role of green manure. Tending should be carried out at least twice a year in the first two years after afforestation, the first time 1 time is in May-June, and the second time is in August-September, that is, shallow excavation should be carried out around the roots of seedlings to avoid deep excavation and prevent root damage, and cuttings should be used in other places to prevent soil erosion. Fertilization can be carried out at the same time as young forest tending, organic fertilizer should be selected as far as possible, and pruning compound fertilizer can be used when conditions are insufficient. Intercropping between forest and grain can be done properly three years before afforestation, but it should be a little far from the roots.
Water and fertilizer management is carried out once a year from July to August, and the tending method is still the combination of acupoint caressing and cutting, and the cut weeds are covered on the roots to reduce water evaporation in summer. Where conditions permit, a drip irrigation system can be built, and at the same time, the required fertilizer can be applied to the roots of torreya grandis through the drip irrigation system. Organic fertilizer can be applied once every spring from May 438 to February, and farmyard manure is the best, and the fertilizer is buried in the roots.
Trimming is an important measure to improve the yield of torreya grandis. In order to achieve high and stable yield of torreya grandis, it is necessary to control tree height and crown width. If the tree is too high, it needs more nutrients, which is not conducive to the picking of torreya grandis. However, if the tree shape is too low, it may not give full play to the yield advantage, and it can be pruned appropriately after afforestation for 2 years. The specific requirements are: the crown height should be controlled at 4-5m, and the crown width should be kept dry and round. After the crown is formed, it should be trimmed regularly every year. At this time, it is only necessary to cut off dense branches and diseased branches.
From February 65438 to February 65438+1October, the soil around torreya grandis was deeply ploughed once, fallen leaves were buried in the soil, and crops such as beans and grasses were interplanted in the woodland, which improved the soil ventilation conditions and increased the income. Shallow ploughing once in July and August, cutting off weeds and twigs, covering torreya grandis rhizosphere, cooling and moisturizing, and harvesting.