Vadose water collector indry land

Abstract

A leakage water collector for dry farm is prepared as setting half-round collector horizontally with its planar surface upwards, setting a numbers of holes on planar surface of said collector, connecting said collector to sealed water collection barrel being set at lower position through water guiding tube at bottom of said collector. The air vent tube and water outgoing rube are set on the top of sealed water collection barrel.

Description

technical field [0001] The technology of the invention belongs to the technical field of agricultural environment experiment, and the device cost is low, and the buried construction is simple and convenient. The in-situ sampling is realized, the excavation of water intake trenches is avoided, the restriction of terrain conditions on the experiment is reduced, and the construction difficulty of embedding experimental devices is reduced. Background technique [0002] Studies have shown that about 30-50% of the fertilizers applied to the soil in the world enter the groundwater through soil leaching (see Bi Jingwei, Zhang Jiabao, Chen Xiaomin, Zhu Anning, Feng Jie: "Soil water leakage and nitrate nitrogen in farmland soil Simulation study on leaching", "Journal of Irrigation and Drainage", 2003, 22[6]). Research on farmland soils in the Taihu Lake area shows that nitrate nitrogen leaching is the main way of nitrogen loss (see Wang Cairong, Hu Zhengyi, Yang Linzhang, Lu Jialong,...

AI Technical Summary

Problems solved by technology

[0004] At present, most studies on the migration of nitrogen and phosphorus in soil use Lysimeter (seepage pond) to overcome the shortcomings of indoor soil column simulation that cannot accurately reproduce the actual field environment (see Lu Jialong: "Phosphorus leaching and its prediction in farmland soil") Acta Ecologica Sinica, 2003, 23[12]; Zhang Guoliang, Zhang Shen: "Research Progress on Nitrogen Leaching Loss in Farmland", "Soil", 1998, [6]; John D Toth, Richard H Fox. Nitrate losses from a corn-alfalfarrotation: "Lysimeter measurement of nitrate leaching", "[J].J Environ Qual, 1998, 27"; Power J F, Wiese R, Flowerday: "Managing nitrogen for water quality lessons from management systems evaluation area", "[J].J Environ Qual", 2000, 29; K.Saarijrvi, P.Virkajrvi, H.Heinonen-Tanski, I.Taipalinen: "N and P leaching and microbial contamination from intensively managed pasture and cut award on sandy soil in Finland", "Agriculture, Ecosystems and Environment", 2004, 104; Winton K, Weber JB: "A review of field lysimeter studies to describe the environmental fate of pesticides", "Weed Technology", 1996, 10[1])

However, the disadvantage of Lysimeter is that it needs to dig a huge trench for sample collection, which causes field experiments to be greatly restricted by the actual terrain, and the construction volume is large and the cost is high

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