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| Effect of super absorbent polymers on soil temperature and water movement dynamics |
| Chen Baoyu1,Wang Hongjun1,Teng Yiyan2,Sun Haiqin3,Yang Jian1,Huang Xuanrui4 |
1.Agricultural Environment and Resource Research Centre,Northeast Agricultural Research Centre of China,130124,Changchun;2.Academy of Forestry
Inventory and Planning,State Forestry Administration,100714,Beijing;3.Forestry Centre of Jinjiagou,Luanping County,068257,Luanping,Hebei;4.Agricultural University of Hebei,071000,Baoding,Hebei: China |
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Abstract In order to find out the effect of super absorbent polymers(SAP) on the dynamics variation of soil temperature and water movement after SAP was used in soil,soil temperature and water movement of SAP-mixed soil were measured at experimental base,Agricultural University of Hebei.The three kinds of SAP were offered by Lvbao Company,Xining,Qinghai Province.Results show that SAP can regulate the variation of soil temperature and improve the capability of heat preservation of soil,so that the difference in temperature of SAP-mixed soil between day and night is decreased.SAP can restrain remarkably evaporation of soil water.The water of SAP-mixed soil can diffuse to dry soil around,and the distance was 2 times as much as control,but soil water content of SAP-mixed soil is still kept at 16%-19%.About 86.7%-88.4% water of SAP-mixed soil is availability(0-1.5 MPa) and easy to be absorbed by plant.The effects of heat preservation and evaporation restraint are better with the dosage of SAP increasing.When soil water diffuses the same distance,the more SAP dosage is used,the higher the water content of SAP-mixed soil is,so that there was enough water to be absorbed by plants and benefit for growing.
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Received: 03 December 2007
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