Planting Technology Lists
-
Control of Soybean Downy Mildew
Soybean downy mildew damages seedlings, leaves and seeds. When the first true leaf unfolds, chlorotic patches appear along both sides of the vein. The leaf surface of adult plant is round or irregular, the edge is not clear yellow-green star point, then turn brown, the back of the leaf has gray mold layer. The surface of diseased grains adhered to gray hyphal layer, containing a large number of pathogen ospores. The pathogen overwinters as ospores on seeds and diseased leaves and becomes the source of infection at the beginning of next year. The disease begins in the middle and late June every year, and the peak period is from July to August. The disease is often serious in rainy years. prevention and control
2019-01-16 -
Trace elements needed for soybean growth and their application
The normal growth of soybean needs some trace elements, among which molybdenum, boron, zinc, manganese and so on are more important. Molybdenum is a component of nitrogenase in soybean nodules and an indispensable component in the normal life activities of nitrogen-fixing bacteria. Boron is also very important in the life activities of soybeans, such as poor root development, poor nodule growth and loss of nitrogen fixation ability. Therefore, attention must also be paid to trace elements. Can the trace elements needed for soybeans be satisfied from the soil? It depends on the abundance and deficiency of trace elements in the soil and the state of the environment. Such as low-lying or non-drainage
2019-01-16 -
What nutrients do soybeans need for growth and development?
Soybean needs a large number of nutrients and many kinds. If the same yield is formed, soybean needs 4-5 times more nitrogen than cereal crops. The nutrients it needs are mainly nitrogen, phosphorus and potassium, followed by calcium, magnesium, sulfur, magnesium, boron, molybdenum, manganese, zinc and copper.
2019-01-16 -
Temperature requirements for the growth and development of soybean
Soybean is a temperature-loving crop. The accumulated temperature of soybean varieties in Heilongjiang Province is about 1800 ℃. The main results are as follows: (1) the optimum temperature for seed germination is 18 ℃ 20 ℃, at which time the germination is fast and the seedling is uniform; the lowest temperature is 6 ℃ 8 mol, but it is very slow; when the temperature reaches 33 ℃, the germination is the fastest, but the seedling is weak. (2) the lowest temperature needed for seedling emergence is 8 Mel 10 ℃. (3) it is suitable for flower bud differentiation to be 21 ℃ 23 min. It is suitable for 22 ℃ to blossom. The temperature is too high or too low to blossom less. (4) suitable for root growth.
2019-01-16 -
What is the response of soybean growth and development to light?
Soybean is a short-day crop with a sunshine range of 9-18 hours. the shorter the light is, the more it can promote flower bud differentiation and early flowering and maturation. when the first compound leaf of soybean grows, it responds to light, and the seedlings can complete the illumination stage by 5-12 days of short-day sunshine. The appearance of calyx primordium in the plant indicates that the lighting stage has been completed. Due to the long-term adaptation to local light conditions, the short-day response of soybean is quite different. The short-day response of southern soybean varieties is strong, while that of northern soybean varieties is not sensitive to sunshine, so special attention should be paid to introduction.
2019-01-16 -
What are the temperature requirements for soybean growth?
Soybean is a temperature-loving crop, which has different requirements for temperature in different growth and development stages. firstly, the seed germination is very sensitive to temperature, the lowest temperature of germination is 6 ℃, the emergence of seedlings is 8-10 ℃, and the seedlings are slightly frozen at-4 ℃. During the whole growth period, the optimum growth temperature of soybean was 20-25 ℃, in which the optimum temperature for seedling growth was 20-21 ℃, the flower bud differentiation stage was 21-23 ℃, the flowering stage was 22-25 ℃, the pod filling stage was 21-23 ℃, and the maturity stage was 19-
2019-01-16 -
Cultivation and management techniques of jasmine
Jasmine is a perennial evergreen shrub of Oleaceae and Jasmine. Jasmine flower is one of the important raw materials for extracting spices and scenting scented tea. Yuanjiang County introduced 10833hm2 double-petal jasmine from Hengxian County, Guangxi to experiment and demonstration from April 1998 to December 1999. after two years of self-propagation, it has been expanded to 5008hm2 (among which, jasmine 11877hm2 was planted in 2001), and 38203hm2 has been put into production.
2019-01-16 -
Pruning techniques of jasmine flowers
Dormant period of pruning: before sprouting in spring, generally pruning before and after Ching Ming Festival, in order to promote a branch to grow neatly, sturdily, and adjust the crown of the branch. The specific pruning methods are as follows: 1. Cut off disease and insect branches, withered branches, twigs and weak branches. 2. Truncate one-year-old branches: cut off the apex of last year's branches and retain the base of 10 cm to 15 cm. 3. Remove all the leaves. Pruning during the growing period: from the sprouting of the Spring Festival to before overwintering, the specific pruning methods are as follows: 1. Pruning (non-flowering branches), overgrowth and decay
2019-01-16 -
Jasmine pruning
In southern China, Jasmine flowers under normal cultivation conditions sprout 6~8 batches of new branches every year. The branches increase and grow taller with the growth of time, and gradually age. Too old and too long branches bring inconvenience to the transportation of water and nutrients, and too high plants also affect field work such as flower picking. Pruning is an important production technology to adjust the distribution of branches and leaves reasonably and promote the healthy growth of plants. The most important pruning of the year is spring pruning. In Heng County, Guangxi, Jasmine Branch
2019-01-16 -
Family Management of Jasmine
Jasmine is a perennial flower of Oleaceae with strong adaptability, easy management and long flowering period, so it is especially suitable for family planting. There are two common flowers: single flower and double flower. Although the single flower is not as good-looking as the double flower, it has a strong fragrance and is easy to take root. It can blossom from June to November, and winter indoors in the north. Jasmine is a natural indoor air freshener, the essence extracted from flowers is an important source of cosmetics, and it is a necessary raw material for smoking fragrant tea and scented tea. Leaves can also be used as medicine. The country of origin is medium
2019-01-16