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The Effects of Water-retaining Agent on the Characteristic of Capillary Water Rising in Sandy Soil

Author: ZuoChangQing
Tutor: GuoFengTai
School: Hebei University of Engineering
Course: Agricultural Soil and Water Engineering
Keywords: insurance agent groundwater recharge capillary water height soil moisturecontent
CLC: S482.99
Type: Master's thesis
Year: 2013
Downloads: 13
Quote: 0
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Abstract


In recent years, in most parts of northern China drought, water shortage problemshave become more serious, but also the human factors of groundwater over-exploitationand irrational use of water resources caused by a series of water balance problems.Agricultural water is the most important, take a lot of water-saving measures foragriculture and water shortage, which aquasorb the most widely used applicationprospects. Water retention agent, also known as soil water, strong water-absorbing resinmade of an ultra-high absorbent polymer water-retention capacity. It not only caneffectively improve soil structure, increase soil moisture content, but also repeatedsuction release water, which play the role of water to reduce water loss.By reading literature, learned impact factor of capillary water rise a lot, such as soilthe concentration of sodium chloride, water retention agent, the application rate and themode of administration, initial soil water content, soil bulk density, the laboratoryexperiments, to take control of a single variable, capillary water rise migrationcharacteristics and its distribution, the main contents include the following aspects:1) different concentration of sodium chloride, the application of water-retainingagent and layer aquasorb two factors under study the height of capillary water rise,groundwater recharge and soil moisture.2) the same concentration of sodium chloride, the initial moisture content, soil bulkdensity the same case studies layer aquasorb amount of capillary water risecharacteristics affect.3) the same concentration of sodium chloride, the initial moisture content, soil bulkdensity the same case, a single control mixed fertilizer thickness and layer applied to theheight of two factors test, analysis of the height of the capillary water rise, groundwaterrecharge and soil moisture content.4) the same concentration of sodium chloride, the same layer applied the heightaquasorb, respectively control the initial soil water content and soil bulk density to testthe different analysis of the height of capillary water rise, groundwater recharge and soilmoisture affected.

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CLC: > Agricultural Sciences > Plant Protection > Pesticide ( chemical control ) > Various pesticides > Other uses agents
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