Because of the great differences in the production conditions and fertilization levels between the natural conditions and farming systems in various parts of southern China, there are also different fertilization methods. Pre-stable, medium-stimulating, and post-supplementary fertilization method: This method is based on applying a certain amount of fertilizer in the early stage, increasing the amount of top-dressing fertilizer to attack large spikes in the middle period, and seeing that the seedlings make up grain fertilizer in the later stage. The general basic amount accounts for 40% to 60%. In the mid-term top dressing, the tiller fertilizer accounts for 30%, the panicle fertilizer accounts for 50%, and the pellet fertilizer accounts for 20%. This method is mainly used in the long-growing period of a hybrid, mid-late rice, large ear, large-grained varieties and poor soil fertility, fertilizer field shortage. Diluted, controlled heavy fertilization method: This method is also mainly used in large ear hybrid rice. "Dilution" mainly refers to the use of a 1 foot 34 wide-narrow row spacing in the case of dilute seedlings. "Control", control basal fertilizer (40% to 50%), no application of manure, enough seedlings to dry the field, control of invalid childbirth. "Heavy", that is, heavy panicle fertilizer, panicle fertilizer accounted for 40% to 60% of the total application amount, divided into two applications. For the first time, 30-35 days before heading, flowering fertilizer was applied to increase the number of spikelets per panicle and late tillering tiller, and the second time in the booting stage (meiosis period) to protect flowering fertilizer to reduce spikelet degradation and Increase the seed setting rate, and spray the potassium dihydrogen phosphate 1 to 2 times for the strong seed fertilizer at the heading stage. No matter which method of fertilization is used, it must be adapted to local conditions, see the seedlings, and scientifically apply fertilizer. The average yield is 550 to 650 kilograms per kilogram. Pure nitrogen is only 8 to 12 kilograms. Applying more is a waste. Silk Face Mask,Face Mask,Cotton Face Mask,Disposable Flat Face Mask Puyang Degren Medical Equipment Co., Ltd. , https://www.degrenyuwei.com
Rice fertilization is due to the "time" system