On November 30, 2009, the state approved the release of GB15063-2009 "Compound Fertilizer (Composite Fertilizer)" national standard, increase chloride ion content indicators, and according to the provisions of low chlorine, chlorine, high chlorine were: not labeled "chlorine "Products, chloride ion mass fraction should be ≤ 3.0%; identification of "chlorine (low chlorine)" products, chloride ion mass fraction should be ≤ 15.0%; identification "chlorine (chlorine)" products, chloride ion The mass fraction of the product should be ≤ 30.0%; products with a chloride ion mass fraction of more than 30.0% should be marked with "chlorine (high chloride)" on the packaging bag. It is understood that chlorine crops include tobacco, potatoes, sweet potatoes, sugar cane, watermelon, grapes, citrus, beets, apples, tea, cabbage, pepper, lettuce, leek and garlic. Chlorine adversely affects solanaceous crops. Soybean and green beans have weaker chlorine resistance. Excess chlorine is also harmful to peaches, avocados, and some leguminous plant crops. The chlorine-loving crops include coconut, oil palm, onion, spinach, cabbage and celery. Thus, high-chloride compound fertilizers are not suitable for use as a base fertilizer for garlic and bamboo shoots.
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