Manure cultivation method in the fish pond before the first base fertilizer, the water quality fertilization, the general use of livestock manure per mu 200 to 300 kg or 100 kg of human waste. After the fish fry under the pond, the amount of fertilizer is determined according to the conditions.......
Jujube trees are one of the fruit trees that everyone is very familiar with. The planting area of ​​jujube trees is very wide. After jujube trees enter the full fruit period, soil, fertilizer and water manag.......
Due to environmental deterioration and overfishing in the Yangtze River squid in China, it has been difficult to see wild populations since the late 1980s. In order to explore the possibility of cultivation of this valuable species of bonito, in June 2003, we introduced 30,000 fertilized hatch.......
To do a good job in pre-sowing seed treatment, in order to ensure that Miao Qi, Miao Quan, Miao Zhuang lay a solid foundation, can effectively prevent diseases, pest damage, we should vigorously promote. The rice seed treatment agent is selected before treatment, and then dried for 1 to 2 days.......
Make full use of natural conditions such as water, land, fertility, dissolved oxygen, light, thermal energy, and biological resources in Putian. Combine planting with aquaculture to achieve a good harvest of fish and fish. First, environmental conditions. Fish farms require good lighting, adeq.......
Vegetables and fruits are fresh foods, and perishable after harvesting. In order to prolong the preservation period, scientists from various countries have invented a variety of preservation technologies. They are introduced as follows: 1. Fresh-keeping carton: This was developed by the Japan .......
Soak 0.5 kg soybeans with hot water and grind them. Pour the milk into a cylinder (preferably a new cylinder) that can hold 30 kg to 45 kg of water. Add 10 kg of water and stir evenly. Add 2.5 kg to 3 kg. Fresh pig blood is added to mix well, the mouth of the cylinder is covered with broken sa.......
To increase the fruit setting rate of peach trees, artificial pollination can be performed easily at the flowering time. During the period of big buds, collect precociously-flowered flowers such as "Yuhualu" and peel off the anthers to be baked. Baking pollen used hard cardboard boxe.......
From the pumping principle of the centrifugal pump, it is known that the impeller rotating at a high speed throws water out and the middle of the impeller forms a vacuum state. A value smaller than the atmospheric pressure is called a vacuum degree, and the maximum vacuum degree is 10 meters o.......
There are many reasons for the planting of peppers in greenhouses, but they are mainly caused by poor vegetative growth, adverse climate conditions, and pest and disease damage. 1. Nutritional malnutrition: due to unfavorable cultivation and management measures, such as excessive planting dens.......
Dissolved oxygen in water is closely related to the growth of fish, mainly reflected in three aspects. 1, the source of dissolved oxygen in water: 1 dissolved from the air. 2 Photosynthesis of plants. 3 supplement water and oxygen. Usually, the photosynthetic oxygenation rate in the still wate.......