Method for acquiring appropriate root temperature interval based on crop requirements
An acquisition method, root temperature technology, applied in the field of acquisition of suitable root temperature range based on crop demand, can solve problems such as not considering the influence of photosynthesis of hydroponic lettuce
Inactive Publication Date: 2017-09-29
NORTHWEST A & F UNIV
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Problems solved by technology
However, leaf temperature, CO 2 Effects of Concentration and Light Intensity on Photosynthesis of Hydroponic Lettuce
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[0062] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0063] This paper invented a method based on hydroponic lettuce in different root temperature, leaf temperature, CO 2 The photosynthetic rate prediction model under the conditions of concentration and light intensity, and the suitable root temperature range obtained by using multi-population genetic algorithm (MPGA) on the basis of this model. refer to figure 1 , the establishment process is as follows:
[0064] 1. Materials and methods
[0065] 1.1 Test materials and methods
[0066] This experiment was carried out at the School of Mechanical and Electronic Engineering, North Campus, Northwest A&F University from March 1, 2017 to March 16, 2017. The lettuce used for the experiment was "butter lettuce". The butter lettuce was in the seedling stage and was taken from Shaanxi Province. The Innovation Park of the Modern Agriculture Demonstratio...
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The invention relates to a method for acquiring an appropriate root temperature interval based on crop requirements, which is characterized in that a photosynthetic rate prediction model is built according to a coupling relation between the root temperature and the illumination intensity, the leaf temperature and the Co2 concentration so as to acquire an appropriate root temperature interval. The method comprises the steps of firstly performing environment pre-adaptation processing on crops by adopting an incubator; secondly, measuring the net photosynthetic rate under different root temperature, leaf temperature, CO2 concentration and illumination intensity conditions in a nested experiment mode by adopting a portable photosynthetic rate tester, analyzing the coupling between the net photosynthetic rate and the environment factors, building a photosynthetic rate prediction model by using a regression type support vector machine, searching the optimal leaf temperature, the optical CO2 concentration and the optical illumination intensity and the corresponding maximum photosynthetic rate under different root temperature conditions by adopting a multi-population genetic algorithm, and acquiring an appropriate root temperature interval, thereby effectively avoiding influences imposed on the photosynthesis of hydroponic crops by too high or low root temperatures in winter and summer, and laying a good foundation for regulating the environment factors such as the leaf temperature, the CO2 concentration and the illumination intensity of facility hydroponic crops.
Description
technical field [0001] The invention belongs to the technical field of intelligent agriculture, and in particular relates to a method for obtaining a suitable root temperature interval based on crop requirements. Background technique [0002] Photosynthesis, as the main index to measure the accumulation of dry matter in plants, is affected by root temperature, air temperature, CO 2 , light intensity and other environmental factors have a great influence, light is one of the essential conditions for plant photosynthesis, CO 2 It is an important participant in plant photosynthesis. Air temperature is a necessary condition for increasing leaf enzyme activity and chlorophyll content, thereby improving photosynthetic ability. The root temperature directly affects the root growth and nutrient absorption of facility hydroponic crops. In addition, the root temperature is easily affected by high temperature in summer and low temperature in winter. As a result, the root growth and nu...
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IPC IPC(8): G06K9/62G06N3/12
CPCG06N3/126G06F18/2411
Inventor 张海辉张盼胡瑾王鑫范叶满张斯威张珍
Owner NORTHWEST A & F UNIV