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...

Examples

Embodiment 1

[0025] The research area in this study is selected from ten clusters of cotton fields in Alar City, such as figure 1 As shown, there are many rivers around Alar City that provide water sources, so agriculture is mainly irrigated with water from the Tarim River or Duolang River. Because there is a large desert near the city of Alar, the highest temperature in a day can reach 35°C, and the lowest temperature is minus 28°C. It is understood that there are 6.57 thousand hectares of fields in the Alar reclamation area. The study area is based on a year. There is very little rain in summer and little snow in winter. Almost every day is sunny and sunny, resulting in low annual precipitation and high evaporation. It is known that the precipitation in Alar in a year The evaporation is 40.1~82.5 mm, and the evaporation is 1876.6~2558.9 mm. As a light-loving plant, cotton, within a certain intensity range, the light and intensity increase with the increase of the light intensity, so cot...

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...

Examples

Embodiment 1

[0025] The research area in this study is selected from ten clusters of cotton fields in Alar City, such as figure 1 As shown, there are many rivers around Alar City that provide water sources, so agriculture is mainly irrigated with water from the Tarim River or Duolang River. Because there is a large desert near the city of Alar, the highest temperature in a day can reach 35°C, and the lowest temperature is minus 28°C. It is understood that there are 6.57 thousand hectares of fields in the Alar reclamation area. The study area is based on a year. There is very little rain in summer and little snow in winter. Almost every day is sunny and sunny, resulting in low annual precipitation and high evaporation. It is known that the precipitation in Alar in a year The evaporation is 40.1~82.5 mm, and the evaporation is 1876.6~2558.9 mm. As a light-loving plant, cotton, within a certain intensity range, the light and intensity increase with the increase of the light intensity, so cot...

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