Fertilizer accounts for an increasing proportion of investment in agricultural production, and the cost of production is getting higher and higher. However,inadequate, unreasonable or excessive application of fertilizers is becoming more and more prominent, causing environmental pollution. So,this paper summarizes the key technologies and basic theories of rational fertilizer application.
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A. Seeding period Watermelon open field cultivation is cultivation in a place without any equipment.. The climate varies greatly from place to place, so the sowing time also varies. In the south, due to the high temperature, the sowing time is early. Northern areas are generally sown late, but early
In Shandong, there are generally two crops of carrots a year. That is, spring crop and summer crop. The minimum temperature for carrot germination is 7℃. And in the northern part of the province and most areas in the north, the sowing period for open field spring carrots is generally
The potato soil testing and fertilization techniques are described below. A. Potato fertilizer requirement law Potatoes have the highest demand for potassium, followed by nitrogen and less phosphorus. In addition, potatoes have a high demand for boron. In the nitrogen, phosphorus, potassium, potassium deficiency has the greatest impact on potato
A. Meaning Compound fertilizer is a collective name for fertilizers containing nitrogen, phosphorus and potassium. Two or more of the three essential nutrients for plants. Also called multi-fertilizer. B. Types of compound fertilizer Compound fertilizer according to the manufacturing process can be divided into: chemical compound fertilizer, compound fertilizer、mixed compound
A. Meaning Controlled-release fertilizer is a variety of regulatory mechanisms to delay the initial release of nutrients, according to crop demand control the release of fertilizer nutrients and release rate. So as to maintain the release of fertilizer nutrients in line with crop demand, thus achieving the purpose of improving
A. Nutrient restitution doctrine In 1840, the outstanding great German chemist Li Bich proposed that as human beings continue to cultivate crops. The nutrients in the soil will become less and less due to the absorption and removal of crops. Which will inevitably lead to a decrease in ground power.The
A. Meaning of water-soluble fertilizer Water-soluble fertilizer is a compound fertilizer containing nitrogen, phosphorus, potassium, calcium, magnesium, trace elements, amino acids, humic acid, alginate, etc. That can be completely dissolved in water. Compared with traditional varieties of calcium superphosphate and granulated compound fertilizer, water-soluble fertilizer has obvious advantages. It is
There are two modes of strawberry cultivation: open field cultivation and greenhouse cultivation. A. Open field cultivation. Generally from mid-August to late September. 1. Seedbed treatment. Thoroughly treat the seedbed before transplanting. Spraying with probiotic soil degrader with water. Spray evenly on the seedbed before evening. 2. Apply sufficient fertilizer.
A. Tomato planting techniques 1.Quantitative indicators of tomato productivity ①Tomato temperature requirements: Tomatoes like temperature, the appropriate daytime temperature of 25 ℃ -28 ℃, 16 ℃ -18 ℃ at night. Below 15 ℃, the tomato seed germination, pollination and fertilization and tomato reddening is affected. Below 10 ℃, slow growth,
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