Application of "four-phase fertilizer" during the fruit tree growth period
During the growth cycle of fruit trees, they need to undergo metabolic processes such as growth, initial results, fruit, aging, and renewal. There are certain differences in the physiological characteristics and nutritional requirements of tree age at different stages. Young-age fruit trees mainly develop tree crowns and expand root systems to fully accumulate tree nutrients. There was not much growth during this period, and the amount of fertilizer needed was not much, but it was very sensitive to fertilizer reactions. If malnutrition occurs at this stage, even if the fruit trees undergo a metabolic process such as growth, early results, fruits, aging, and renewal during the growth cycle, the physiological characteristics and nutritional needs of the different stages of the tree are different. Young-age young fruit trees mainly develop tree crowns and expand root systems to fully accumulate tree nutrients. There was not much growth during this period and the amount of fertilizer needed was not much, but it was very sensitive to fertilizer. If malnutrition occurs at this stage, it will be difficult to make up for it even if it is applied later. Phosphorus fertilization and proper application of nitrogen and potassium fertilizers are one of the key measures for early fruit and early high yield. The results of the initial period of no results or enter the initial result period, due to the continuous expansion of the root cap, to maintain more vigorous vegetative growth, nitrogen fertilizer should account for a larger proportion. During this period, we must continue to expand the canopy and promote flower bud differentiation. Therefore, phosphorus and potassium should be added on the basis of nitrogen fertilizer application. The results of the mid-term results of the adult tree, the main purpose of fertilization is high-quality, high-yield, increase commodity value. As the results of multiple and successive flower bud differentiation, should increase the proportion of phosphorus, potassium, calcium fertilizer, so fertilization should pay attention to nitrogen, phosphorus, potassium and calcium fertilizer, especially to increase the proportion of potassium fertilizer. Results After the full fruit period, the tree gradually became senescent. In the old age, more nitrogen fertilizer should be applied. The proportion of nitrogen fertilizer should be the same as that of saplings in order to promote rejuvenation and maintain fruit. It can be seen that there are different matching requirements for fertilizers in different growth stages of fruit trees. Only proper fertilization can make fruit trees grow vigorously and achieve high quality and high yields.
Europe: 2011 was a strong year for European plant extracts. As the largest herbal medicine market in the world, products made from plant extracts are favored by local consumers. From January to December, China's export of plant extracts to EU was 290 million US dollars, up 63.2% year on year, the export quantity was 11,000 tons, up 15.1% year on year, the average export price increased 41.8% year on year, showing a good situation of both volume and price rising. The main exporters of plant extracts to Europe are Spain, Germany, France and the United Kingdom.
American market: The North American market or American market is the most important export market of Chinese plant extracts, ranking first in plant extracts export since 2005. Taking dietary supplements has become a habit for most Americans, which has led to a growing demand for plant extracts in the world's largest market for dietary supplements. The US market has become a global vane for medicinal and health plant extracts, and the increase and decrease of market demand will directly affect the changes of other global markets. In 2011, China exported $180 million of plant extracts to the United States, up 54% year on year. The export volume is 8,050 tons, up 32% year on year.
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