Portable, fixed-time and multi-point ammonia volatilization sampling device for wetting and drying alternative rice field

Abstract

The invention relates to the technical field of rice field experiment, in particular to a portable, fixed-time and multi-point ammonia volatilization sampling device for a wetting and drying alternative rice field. The portable, fixed-time and multi-point ammonia volatilization sampling device comprises a support annular plate, wherein a sliding groove is formed in an outer surface of the supportannular plate, a sliding rod is arranged in the sliding groove, an installation plate is fixedly connected with the other end of the sliding rod, an enclosed air chamber is arranged at the bottom of the installation plate by a fixed rod, a sponge plug and a sampling tube are arranged at the top of the enclosed air chamber, a support vertical post is arranged at a lower surface of the support annular plate, a support bottom plate is fixedly arranged at the bottom of the support vertical post, and a gas washing bottle is arranged at one side of the support vertical post. By the sliding groove and the sliding rod, the enclosed air chamber can be conveniently and stably adjusted at different rice field positions, and multi-point ammonia volatilization sampling is achieved; and moreover, a timer and a controller are arranged, sampling operation is performed in a fixed-time way, the equipment is integrally arranged, integral carrying and moving are facilitated, and convenience is provided for experiment sampling operation of the rice field.

Description

technical field [0001] The invention relates to the technical field of paddy field experiments, in particular to a portable timing multi-point ammonia volatilization sampling device for alternately wet and dry paddy fields. Background technique [0002] Rice is not only a large water-consuming household in my country's agriculture, but also a large fertilizer-consuming household in my country's agriculture. The average fertilization amount of rice in my country is about 190kg·ha-1, which is 1.9 times the world average level, and the annual fertilization (nitrogen) amount in some areas even exceeds 600kg·ha-1. According to statistics in 2010, the nitrogen consumption of rice in my country accounts for about 31.3% of the total nitrogen consumption of rice in the world. While increasing the productivity of rice by increasing the application of nitrogen fertilizer, it is followed by a serious reduction in the utilization rate of nitrogen fertilizer, causing a series of environm...

AI Technical Summary

Problems solved by technology

The traditional airtight chamber method belongs to time point sampling, and its representativeness is poor in the alternating dry and wet environment with uneven space and time, and often cannot meet the test accuracy requirements.

Images