Identification method for adaptability of plant to low-phosphorus environment

Abstract

The invention discloses an identification method for adaptability of a plant to the low-phosphorus environment. The method is characterized in that hydroponics is conducted on the plant to be surveyed; then, after starving culture is conducted on the plant for 48 h in a culture solution without inorganic phosphorus, a dihydrogen phosphate ion absorption experiment is conducted, according to the Michaelis constant and the minimum concentration, obtained in the dihydrogen phosphate ion absorption experiment, of dihydrogen phosphate ion absorption of the plant to be surveyed, the available phosphorus content of the riphzosphere environment of the plant to be surveyed grown in the environment to be tested, and the relative absorption rate of dihydrogen phosphate ions of the plant to be surveyed is further calculated according to the Michaelis constant and the minimum concentration of the dihydrogen phosphate ion absorption and the available phosphorus content of the riphzosphere environment; finally, the adaptability of the plant to the low-phosphorus environment is evaluated according to the obtained relative absorption rate of the plant to be surveyed. The method is few in steps, simple in calculation, reliable in data and capable of rapidly identifying the environmental adaptability of different plants to the same low-phosphorus environment and provides a technological support for sorting plants suitable for growing in karst and terricolous floating plants.

Description

technical field [0001] The invention relates to a method for identifying the adaptability of plants to a low phosphorus environment, belonging to the field of ecological management. Background technique [0002] Inorganic phosphorus (P) in soil is one of the most important limiting factors affecting plant growth. Numerous studies have shown that phosphorus deficiency affects the photosystem of plants (Photosystem ) process, resulting in the closure of stomata, the decrease of net photosynthetic rate, and the change of chlorophyll content and chlorophyll fluorescence parameters. [0003] China's karst (karst) distribution area is about 1.3 million Km 2 , of which the rocky desertification area accounts for about 28.7%. "South rock (rocky desertification) and northern sand (desertification)" have become two major ecological environmental problems that restrict the sustainable development of the western region. The bedrock in karst habitats is mostly carbonate rocks, the...

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Problems solved by technology

At the same time, during the karstification process of the bedrock, hydrogen ions are also consumed to form a large amount of calcium ions and bicarbonate ions, which is bound to transform the overlying soil so that the overlying soil presents a high pH, ​​high calcium and In the environment of high bicarbonate, in the alkaline lime soil in the karst area, due to the high adsorption and insolubility of phosphorus, the form of phosphorus in the soil cannot be transformed into inorganic phosphorus (HPO) required for plant growth. 4 2- or H 2 PO 4 - ) for direct absorption, the supply of inorganic phosphorus is severely limited, restricting the growth and development of plants in karst areas

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