Satellite remote sensing monitoring method for cotton canopy nitrogen

Abstract

The invention discloses a satellite remote sensing monitoring method for cotton canopy nitrogen. Remote sensing techniques are used, a lot of electromagnetic radiation on the earth surface is sensed;a series of indices are then obtained, inversion is carried out through various indexes; cotton is used as a research object, cotton is monitored in real time, positioning is accurate, crops are not damaged, then a characteristic spectrum parameter model of the growth condition and all vegetation indexes of nitrogen is established, by means of the model, the correct fertilization amount can be conveniently and rapidly obtained, and the problem that it is difficult to determine the nitrogen content, and the fertilization amount is increased at a time to solve the high yield is solved.

Description

technical field [0001] The invention relates to a satellite remote sensing monitoring method for cotton canopy nitrogen. Background technique [0002] Cotton accounts for a large proportion in the development of agricultural economy. The output of cotton restricts economic development and social progress at the same time. Among the many elements that affect the growth of cotton, nitrogen tends to have the greatest impact on cotton. It not only affects The development of cotton also affects the synthesis of protein, nucleic acid, and chlorophyll. The nitrogen in cotton mainly comes from the soil. During the growth period of cotton, cotton has the greatest demand for nitrogen at this time, and nitrogen is the key to maintaining normal crops. One of the many elements of growth is also the key factor for increasing cotton production. In order to increase cotton production, it is generally believed that only by continuously increasing the amount of fertilizer can the crop yield b...

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Problems solved by technology

[0002] Cotton accounts for a large proportion in the development of agricultural economy. The output of cotton restricts economic development and social progress at the same time. Among the many elements that affect the growth of cotton, nitrogen tends to have the greatest impact on cotton. It not only affects The development of cotton also affects the synthesis of protein, nucleic acid, and chlorophyll. The nitrogen in cotton mainly comes from the soil. During the growth period of cotton, cotton has the greatest demand for nitrogen at this time, and nitrogen is the key to maintaining normal crops. One of the many elements of growth is also the key factor for increasing cotton production. In order to increase cotton production, it is generally believed that only by continuously increasing the amount of fertilizer can the crop yield be increased, resulting in a continuous increase in the amount of fertilizer, which has reached 400 kg / hm 2 , but when the nitrogen content is excessive, the impact is that the cotton plants are higher than normal crops, and the plants become denser, which affects the light, and at the same time, it will cause cotton to drop bolls and buds, thereby reducing the cotton production; When the nitrogen content is lacking, the effect is that the cotton plants are short, the number of flowers is reduced, the number of leaves is reduced, and the lateral branches are reduced, thereby reducing the yield of cotton

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