| Effects of salinization on soil physicochemical characteristics and agronomic traits in arid oasis |
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| DOI：10.7606/j.issn.1000-7601.2013.03.30 |
| Key Words: salinization gradients soil physicochemical characteristics alfafal barley agronomic traits yield |
| Author Name | Affiliation | | WANG Yan | Cold and Arid Regions Environmental and Engineering
Research lnstitute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
Graduate School of Chinese Academy of Sciences, Beijing 100049, China | | ZHAO Xueyong | Cold and Arid Regions Environmental and Engineering
Research lnstitute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | ZHAO Halin | Cold and Arid Regions Environmental and Engineering
Research lnstitute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | PAN Chengchen | Cold and Arid Regions Environmental and Engineering
Research lnstitute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: |
| In attempt to study effects of farmland salinization on soil physicochemical properties and agronomic traits, dry matter accumulations and yields of one-growing-season of representative forage(Medicago sativa L.)and ce-real(Hordeum vulgare L.) were studied in field eonditions in Hexi Corridor of West China. The results showed that:(1)In the depth of0~20 cm, along with the salinization gradients, soil bulk density in forage was increased by 3%, 4.54%, 8.62%, 9.96%, No soil bulk density change was observed in cereal, but its soil organie matter was significantly decreased, and the deerease rate in the depth of 0~10 cm was faster than that in the depth of 10~20 cm;(2)When soil salinity level equal to or higher than moderate salinization level, ear length, grain number and straw
weight of barley plant were significantly affected. Salinity at flowering, early ear formation and grain-filling stages reduced both grain and straw yields. When soil salinity level equal to or higher than slightly salinization gradient, plant height, length of main and secondary braneh, and tap root diameter of alfalfa
plant were decreased. In conclusion, based on the agro-nomic traits and the different impact of salinization on these two crops at different growth stages, water and salt need to be regulated and controlled and proper cultural practices need to be employed to maintain, stabilize, and increase crop yield in saline environment. |
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