Measuring method for dust fall quantity of plant canopy leaf surface

Abstract

The invention relates to a measuring method for the dust fall quantity of a plant canopy leaf surface. The measuring method comprises the following steps: (1) selecting a well-grown plant, and picking 15-20 leaves from the upper, middle and lower parts of a plant canopy; (2) placing the healthy leaves picked from each plant in numbered envelopes, taking the envelopes to a lab, shearing the petioles of the leaves, and drying the leaves without the petioles in a drying box under the temperature being 105 DEG C; (3) weighing the leaves in the step (2) to obtain W1; (4) soaking the leaves after the weighing in the step (3) in distilled water for 20-30 minutes, so as to enable falling dust on the front surface of the leaves to be cleaned, after washing of the leaves by the distilled water, drying the washed leaves till the weight is constant, and weighing for the second time to obtain W2; (5) wetting the leaves in the step (4), and measuring the total leaf area S of each plant by a leaf area measuring instrument, wherein a computational formula of the dust fall quantity is as follows: FDC (g.m<-2>)=(W1-W2) / S*10000. The method is simple, easy to operate, and can be used for providing new indexes for air quality monitoring; by using the method, the breakthrough and the progress of research on influence of leaf surface dust fall on the plant can be realized.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring and evaluation, in particular to a method for measuring the amount of dust falling on leaves of plant canopies. Background technique [0002] Falling dust on leaves refers to a layer of obvious dust accumulation formed on the surface of leaves after the floating dust in the atmosphere has settled. Foliar dust has obvious negative effects on the growth and development of plants, such as reducing the efficiency of plant photosynthesis, thereby affecting the accumulation of dry matter. At the same time, the amount of dust falling on leaves can effectively reflect the air quality in the area, and can be used as an effective indicator for evaluating air quality. Sandstorm is a common disastrous weather in Northwest my country, which causes a large amount of floating dust in the atmosphere. The floating dust has obvious negative effects on human health and affects human health. After t...

AI Technical Summary

Problems solved by technology

[0005] The present invention is to solve the lack of an index that can reflect the air quality in a certain local area for a long period of time in the existing air quality monitoring and evaluation, and it is difficult to obtain deeper results for the current research on the damage of foliage dust to plants, etc. In order to solve the problem, a simple method, easy to operate, which can provide a new indicator for the monitoring and evaluation of air quality and the research on the harm of leaf dust to plant growth and development