Southern Xinjiang is one of the major producing areas of walnuts in China, while winter wheat is the main food crop in Daejeon. The widely adopted method in southern Xinjiang for a long time has been the production of nuclear wheat intercropping, but this method inevitably exists in the light of crop competition. Resources, moisture, nutrients and other resources, so in order to make full use of existing land resources to ensure the safety and stability of food production, then use the root system analysis system to study the root distribution characteristics of walnut-wheat composite system to understand how the walnut roots Distribution, walnuts and crops in the low part of what kind of competition exists between the nuclear wheat intercropping is a key scientific problem to be solved.
The root system was analyzed through the root analysis system. The spatial distribution of plant roots in the walnut-wheat composite system and the monocropping system was compared and the composite system was evaluated by the land equivalent method. The results showed that the root surface area density and root mass density of walnut and wheat in the composite system were smaller than that of walnut monocropping and wheat monoculture of the corresponding soil layer; the roots of 1a raw walnut and 2a raw walnut in 20~40cm soil layer in the composite system The surface area density was 30.36% and 26.18% lower than that of 1a raw walnut monocropping and 2a raw walnut monoculture; the wheat root surface density was 20~40cm deeper than that of 1a raw walnut intercropping and 2a raw walnut in composite system. Monocropping decreased by 23.7% and 59.2%; the root mass density of 1a raw walnut and 2a raw walnut in 0~40cm soil layer in the composite system and monocropping system was 75.31% of total root biomass in 0~100cm soil layer, 82.84 %, 76.76%, 83.23%; 0~40cm soil layer is the overlapping niche of walnut and wheat root system, which promotes the uneven distribution of root system in the composite system; the aboveground biomass equivalence ratio (1.620 and 1.617) of the composite system is greater than 1, Compared with the corresponding single cropping model, the land use efficiency is improved.
Shutter Doors And Windows Roll Forming Machinery is for making the color steel rolling shutter doors or windows, which is widely used in garage door, factory door,shop door,supermarket door and so on. And we can supply the door frame machines. There are many kinds for different countries. At the same time, for the special needs, we also produce fireproof rolling shutter doors and windows machine and anti-wind shutter door machine.
Shutter Doors And Windows Roll Forming Machinery
Door Frame Making Machine,Steel Roller Shutter Door Machinery,Window Shutter Forming Machine,Rolling Shutter Door Forming Machine,Rolling Shutter Door Frame Forming Machine,Shutter Door Frame Machine
Xianfa Roll Forming Machine Factory , https://www.btxianfa.com