First, several reasons for the low yield of rapeseed:
1, irregular management
Due to the existence of market factors, including ignorance of Camellia oleifera production and insufficient capital investment, Camellia oleifera forest has long been lack of management, overgrown with weeds, uneven distribution, almost semi-barren, and very bad ventilation conditions, resulting in serious pests and diseases and low Camellia oleifera yield.
2, lack of capital investment and scientific and technological services, lack of production base.
Farmers are unable to invest in new varieties of camellia oleifera and transform them at the same time. The government's support for Camellia oleifera industry is not enough and there is no continuity. In addition, there is a lack of capital investment, scientific and technological guidance and training for professional and technical personnel. In the management of Camellia oleifera, the pace of transformation of low-yield forests has slowed down.
3, the variety is messy
Low-yield camellia oleifera forests are often sown directly, with low emergence rate and serious shortage of plants. Long-term cross-pollination leads to the confusion of varieties in Camellia oleifera forest, the proportion of inferior plants is relatively large, and the yield of plants varies greatly. In the low-yield forest area of Camellia oleifera, Camellia oleifera varieties with great differences in flowering period, fruit shape and maturity often appear chaotic growth.
4. The trees are seriously aging.
Due to the long-term lack of management, trees are generally weak and aging is also very obvious. Individuals enter the aging stage ahead of time, and their physiological functions are reduced. The ability of roots to absorb nutrients and the ability of leaves to respond to light are weakening, which does not provide sufficient nutrients for plant growth and development, and the yield is obviously reduced, and the phenomenon of plant death is becoming more and more serious. Many lichens attach to plants, and the number of pests increases greatly, and the phenomenon of falling flowers and fruits is very serious.
Second, how to transform the low-yield rape forest?
According to the actual situation of low-yield Camellia oleifera forest, we should improve the stand structure and land conditions in the first two cases, select the stand with better land conditions in the third forest area, update the forest land varieties with development potential, and transform the forest species according to the requirements of classified harvest in the fourth forest area.
1, improve soil conditions.
(1) Repeated tillage.
Deep ploughing and reclamation can obviously promote the growth and development of Camellia oleifera, and the yield is greatly improved. In the winter of the first year of renovation, all the land should be plowed once, with a depth of about ten to twenty centimeters, and then plowed again in two to three years. When ploughing, organic fertilizer should be used, and the crown should be fertilized as required. Farming should be done once a year in summer, and the depth is about 10 cm. When plowing, weeds should also be removed, soil should be loosened, and ladders should be made to preserve soil, fertilizer and water.
(2) Increasing moisture and fertilizing
One of the main reasons for the low yield of Camellia oleifera forest is the lack of fertilizer. Combined with repeated cultivation and fertilization, the yield of Camellia oleifera can be greatly improved. Give priority to with organic fertilizer in big year, nitrogen fertilizer in small year, organic fertilizer in autumn and winter, and quick-acting fertilizer in spring and summer. Forest land should be fertilized according to the requirements of fertilizer.
3. Strengthen pest control.
Camellia oleifera is susceptible to diseases and insect pests, so it is necessary to strengthen the prevention and control of diseases and insect pests, strive to improve the ecological environment and adopt biochemical control methods to solve the problems of diseases and insect pests.
The above small series tells you four main reasons for the low yield of rapeseed. If you want high yield of rapeseed, I suggest you learn some methods shared in the above small series. I hope this article can help you.