Grass and fruit trees coordinated symbiosis "Grass cultivation is a fruit tree cultivation method in which native weeds or non-native grasses, green manure crops, etc. are selected between the rows of the orchard, and managed so that the grasses and fruit trees can co-exist." December 4 At the training meeting, Zeng Ming, a technical expert from the Sichuan Grassland Technology Research and Promotion Center, said that orchard grassing began in the United States in the mid-19th century. In the mid-1940s, due to the advent of the ditching rotary lawn mower and the orchard sprinkler irrigation With the development of the system, this soil management model has been widely promoted in the United States. Subsequently, the grass cultivation model was widely used in countries with developed fruit production such as New Zealand, Japan, Italy, and France. "In the 1990s, my country began to promote orchard grass cultivation as a green fruit production technology system throughout the country, establishing some typical demonstration models. But in general, the development of grass cultivation in my country is still in its infancy." Zeng Ming said At present, the area of ​​clear ploughing orchards still accounts for more than 90% of the total area of ​​orchards in China, and grass growing in orchards is still only an experiment or small area application. Compared with traditional planting methods, grass cultivation is more conducive to maintaining water and soil, improving soil structure and nutrition, and regulating ground temperature, inhibiting weed growth, improving biological control capabilities, and improving fruit quality. What is the difference between orchard grass and orchard weeds? Most of the grasses in the orchard are legume pastures or carefully selected native weeds. They are cultivated crops. They can be fertilized by biological nitrogen fixation and other methods. The grass layers are mostly below 50 cm, with large coverage and moisture retention* ********, has no adverse effects on fruit trees; while the orchard******weeds are mostly land-consuming crops such as Gramineae, Amaranthaceae, Chenopodiaceae, etc. The plants are tall and grow upright. Deep water and nutrient absorption are more, not only can't cultivate fertility, but also compete with fruit trees for fertilizer and water, and consume a lot of nutrients in the soil. "For grass cultivation, the selection of suitable grass species is an important part." Zeng Ming said that grass species suitable for grass cultivation include clover, perennial ryegrass, alfalfa, salvia and so on. So dry grass cultivation Zeng Ming said that in young and early fruit citrus orchards, you can choose between rows, and the grass belt is about 40 cm away from the outer edge of the tree tray. In adult orchards, grass can grow between rows and trees, and no grass will grow under the tree tray. To prevent pests from damaging the trunk. It is not easy to cultivate grass in densely planted orchards, and other organisms can be used to cover between rows. The mulching time can be selected from May to July before the summer high temperature, and late-maturing citrus can be covered in the orchard before the temperature drops in November. The mulch can be mowed grass, crop stalks, chaff, etc. according to the season. This can effectively prevent the effects of high temperature and drought in summer and low temperature in winter, and can also gradually increase soil permeability and organic matter content. The sowing time of green grass is divided into spring sowing and autumn sowing. Spring sowing can be carried out from late March to April. "Sichuan citrus production areas are mainly planted in autumn, and grass can be planted from mid-to-late September to mid-November." Zeng Ming said that before planting, the fruit trees should be turned 20-25 cm deep, leveled, irrigated, and planted when the moisture content is suitable. . Start cutting when the height of the grass is more than 30 cm. Cut 2 to 4 times in a growing season. The cut grass covers the tree trays, which can control the height of the grass, promote the tillering and branching of the grass, and increase the coverage rate. And yield. The grass that grows in autumn is no longer mowed, and stubble is left to cover it in winter. When mowing the grass, you can choose to leave a portion of the grass for the next mowing, so as to reciprocate to reserve some living space for natural enemies. After the orchard has grown grass for a certain period of time, it should be pressed and updated in time. In addition to mowing the grass in time, you can also use the method of "rolling", that is, when the grass grows to a certain height, drive with a pallet for a trip to flatten the grass. After a few years, the grass will grow. If it is not high, it can be pressed closer to the ground. After being flattened, the fallen grass slowly rots away. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for handling. phone Three-Way Thread Ball Valve,Stainless Steel Gate Valve,Casting Stainless Steel Gate Valve,Threaded Gate Valve Wenzhou Gaoya Light Industry Machinery Co.,ltd. , https://www.hongyafitting.com