Portable Leaf Area Analyzer Analysis of Leaf Area and Nitrogen of Cotton in South Xinjiang
Ethylaluminum Sesquichloride,Ethylaluminum Sesquichloride Solution,Ethyla Luminum Sesquichloride,Ethyla Luminum Sesqui Chloride Jiangsu MO opto-electronic material Co., Ltd. , https://www.jsmochem.com
The portable leaf area meter found that applying N fertilizer can increase the leaf area of ​​wheat and increase the content of chlorophyll and sugar in functional leaves; the high-fertilizer can deal with corn stomatal conductance, transpiration rate, root discharge and chlorophyll content etc. The main physiological indexes were significantly higher than those of low-fertilization treatments. The insufficient or excessive nitrogen fertilizer application accelerated the leaf area coefficient of maize during the late growth period and the decline of chlorophyll content in the ear-stage leaves, leading to premature leaf senescence.
The chlorophyll content of cotton at the late growth stage kept the physiological activity of the leaves at a relatively high level, especially for retarding the senescence of the middle and lower leaves of cotton, improving the photosynthetic capacity of the leaves, and ensuring the formation of more photosynthetic products at the later stage of reproduction. Over-application of nitrogen will cause the leaf area to increase rapidly during flowering and boll light, which will affect the photosynthesis of the middle and lower leaves. In particular, the excessively fertilized and prosperous cotton fields, due to the overgrown branches and leaves that form the field cover, poor ventilation and light transmission, resulting in destruction of chlorophyll structure. In actual production, appropriate nitrogen fertilizer should be applied according to the local light and heat resources, species characteristics and cultivation level, so as to increase the physiological activity of the individual leaves, increase the photosynthetic area, improve the photosynthetic performance of the leaves, and increase the photosynthetic rate from the booming stage to the boll opening stage. Extend the time of efficient use of light energy, thereby enhancing the photosynthetic performance of cotton populations, laying a favorable material basis for high cotton yield.
In southern Xinjiang, there are abundant light and heat resources, which requires the reasonable words of reasonable nitrogen fertilizer to promote the leaf area, improve the photosynthetic performance of the cotton population, and prolong the photosynthetic utilization time. At the same time, a portable leaf area meter should be used to effectively measure the leaf area. To avoid over-application of nitrogen fertilizer, resulting in late-cooked cotton glutinous, reduced yield, deterioration of quality, while increasing the input of cotton fertilizer, ultimately resulting in waste of resources and potential environmental pollution.