Method for improving chlorophyll fluorescence power of festuca arundinacea under dry condition by cerium

Abstract

The invention relates to a method for improving chlorophyll fluorescence power of festuca arundinacea under a dry condition by cerium. According to the method, seeds of festuca arundinacea are sown on the garden soil subjected to lawn establishment, wherein every 100-200g of garden soil contains 200mg / Kg-800mg / Kg of cerous nitrate, then the chlorophyll fluorescence power parameters are measured under the normal water supply condition three weeks later; then moisture is controlled to the extent that the moisture content reaches the degree of moderate drought stress, and then the chlorophyll fluorescence power parameters are measured again seven days later; the moisture is controlled again to the extent that the moisture content reaches the degree of serious drought stress; and under the condition of serious drought stress, the chlorophyll fluorescence power parameters are measured for the last time seven days later. The plant chlorophyll fluorescence dynamics is a novel, quick, simple and accurate new technology, by which the physical state of photosynthesis of the plants can be detected without damaging the plants on the whole.

Description

technical field [0001] The invention relates to the application of rare earth cerium in the technical field of urban lawn construction, in particular to a method for improving tall fescue chlorophyll fluorescence dynamics in arid environment by using cerium. Background technique [0002] As an ecosystem, lawn is a huge carbon source storehouse, and grassland soil in the world can absorb and deposit 0.01-0.3Gt of carbon every year. thus reducing CO in the air 2 to reduce the greenhouse effect to a certain extent. Secondly, the dense surface covering layer and grass root layer formed by the turf have a good effect on preventing soil erosion; the turf can also reduce the daily temperature difference on the surface, so it can effectively reduce the soil collapse caused by "frost heave". The lawn has a huge ability to absorb floating dust, which can effectively prevent secondary dust, and can also reduce wind speed and prevent dust. Turf has the ability to absorb CO in the air...

AI Technical Summary

Problems solved by technology

Lawn plants have weak root activity in the seedling stage, and the growth of the aboveground parts is slow, and the characteristics of weak early growth of lawn plants often make lawn plants in a disadvantaged position in the competition with weeds in the early stage of growth. Such results can lead to Lawn planting failure; in addition, under the environmental conditions of drought and water shortage, the phenomenon that lawn plants are at a disadvantage in the early stage of growth is particularly prominent in the competition with weeds; this directly affects the survival rate of lawn plants; The biggest difficulty in the application of planting in practice, that is, the problem of lawn planting experiencing technical "bottleneck" constraints

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