Method for measuring rice field profile soil bulk densities rapidly, simply and conveniently

Abstract

The invention discloses a method for measuring rice field profile soil bulk densities rapidly, simply and conveniently. The method comprises the particular steps that a soil auger is vertically driven into rice field soil, and when the acquisition soil profile depth is D, the soil auger is driven to a position of a same depth D cm; n layers are divided to take soil samples according to research requirements after the soil samples are taken out, and corresponding depths of the layers are 0-D / n, D / n-2D / n, 2D / n-3D / n, 3D / n-4D / n,... (n-1) D / n D. The taken soil samples are dried and weighed and the weighed soil samples are divided by corresponding volumes respectively to obtain soil bulk densities of corresponding soil layers. According to the method for measuring rice field profile soil bulk densities rapidly, simply and conveniently, the rice field profile soil bulk densities can be measured rapidly, simply and conveniently; soil depths can be adjusted according to requirements to measure soil bulk densities; and limits of fixed depths of cutting rings or the taking of intermediate depths merely to represent soil bulk densities of certain layer depths are broken through. Compared with traditional methods which use cutting rings to dig profiles to measure field profile soil bulk densities, the sampling related ground surface soil area is small, disturbed soil layers are small, and the labor force is saved for more than 400%.

Description

technical field [0001] The invention relates to a method for measuring the soil bulk density of a paddy field section, belonging to the field of soil physical and chemical property measurement. Background technique [0002] The traditional profile soil bulk density measurement usually uses the ring knife method, and its limitation is that it can only measure the height of the ring knife (generally 5 cm). To determine the bulk density of a certain soil layer such as 0-20 cm depth, it is necessary to use a ring knife to sample at its middle position such as 7.5-12.5 cm. When collecting profile soil, the method of digging pits is generally adopted, for example, 100 cm deep. Generally, pits with a length, width, and depth of more than 100 cm are excavated, and soil ladders are also made. The workload is heavy, and an average person can only dig two such sections a day, which is inefficient. The surface soil area involved in the excavation of the pit is large, and the soil laye...

AI Technical Summary

Problems solved by technology

Moreover, due to the long-term flooding of the paddy field, there is often water accumulation in the lower part of the profile, and it is very inconvenient to take samples to measure the soil bulk density.