A method for in situ monitoring of rice rhizosphere oxygen secretion
A technology of rice root and oxygen secretion, which can be used in measurement devices, instruments, scientific instruments, etc., can solve the problem of not fully reflecting the oxygen secretion capacity of plant rhizosphere.
Active Publication Date: 2019-05-14
CHINA NAT RICE RES INST
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Problems solved by technology
However, there is a problem in the prior art that hydroponic conditions cannot fully reflect the ability of plants to secrete oxygen from the rhizosphere in the soil environment.
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Embodiment 1
[0055] In the experiment, rice-planting and no-rice-planting treatments were set up in yellow catfish ponds, and each treatment was repeated three times. The experimental plots are built from plots of the same size separated by ponds for many years, and each plot is 228m 2 (19m*12m), the depth of the pond is 1.5m.
[0056] The rice planting plot uses special rice varieties with high stalks for fish ponds. Seedlings are bred in early May and transplanted in the middle of the plot on June 14. The transplanting density is 60×60 cm, and the planting area accounts for about 60% of the total area of the plot. On July 11, yellow catfish fry were put into the community. The amount of yellow catfish fish was 280 / jin and 25,000 fish / mu, and all were managed according to conventional farming methods. The water depth of plots increased with the growth of rice, and the plots with rice and no plots kept the same water level. The rice was harvested on October 26 of that year.
[0057] B...
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Abstract
The invention provides a method for in situ monitoring oxygen secreting volume on paddy rhizosphere and belongs to the field of determination of plant oxygen secreting volume. The method comprises the following steps: placing an opening container with a root bag fixed therein into a paddy field before transplanting the paddy; filling the root bag with the soil in the paddy field, wherein the soil in the root bag is aligned with the upper surface of the soil in the paddy field, the root bag and the opening container are in same volume, the root bag allows water to pass but does not allow the paddy root system to pass and the opening container allows water and soil to pass; transplanting in the root bag; taking the opening container from the paddy field and then placing into a water-tight vessel 12-24h before the determination for the oxygen secreting volume on paddy rhizosphere; taking the surface water from the paddy field and adding into the root bag; standing by and then adopting a Unisense micro-electrode for measuring the oxygen secreting volume on paddy rhizosphere; and causing the height of the upper-layer water of the paddy in the root bag be as same as the height of the upper-layer water of the paddy field by adding the surface water or voluntarily preparing according to the experimental objective. The method provided by the invention is simple in operation and low in cost and is capable of realizing the monitoring for the oxygen secreting volume on paddy rhizosphere at different time and in different spaces.
Description
technical field [0001] The invention relates to the technical field of measuring plant rhizosphere oxygen secretion, in particular to a method for in-situ monitoring of rice rhizosphere oxygen secretion. Background technique [0002] Rice is not only an important food crop in my country, but also a typical wetland plant. In order to adapt to the long-term waterlogged anaerobic growth environment, rice can transport the oxygen produced by leaf photosynthesis and the oxygen obtained by gas exchange to the roots through the root and stem aerenchyma to ensure that the roots have a suitable oxygen concentration. Oxygen secretion from the rice rhizosphere can not only provide oxygen for root respiration, but also affect ecological processes such as root nutrient uptake, physiological metabolism, microbial community structure, and greenhouse gas emissions. Therefore, it is of great significance to find out the ability of rhizosphere oxygen secretion at different soil depths in dif...
Claims
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IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 李凤博冯金飞周锡跃方福平
Owner CHINA NAT RICE RES INST