Crops planting on improvement of saline soil in coastal reclamation area: A case of sorghum planting under covering conditions
CHEN Li-hua1, SU Wei-xia1, YAO Yu-tian2, GUO Shi-wei3, HAN Rui1, SHANG Hui4, ZHOU Long-xiang4, WANG Dong4, ZHANG Feng-ge5
1. College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China; 2. Jiangsu Coastal Development Group Co., Ltd. Nanjing 210019, China; 3. Institute of Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; 4. Jiangsu Coastal Development(Dongtai) Co., Ltd. Yancheng 224237, China; 5. College of Agro-grassland Science, Nanjing Agricultural University, Nanjing 210095, China
Abstract：To investigate the effect of sorghum planting on coastal saline soil physicochemical properties, biological characteristics and surface biomass, a field experiment was carried out during single growth period (from middle April to middle August) in coastal reclamation area. The results showed that sorghum planting significantly (P<0.05) improved the soil physicochemical properties. Compared with NP (without covering and sorghum planting) and NPC (only covering), salt content and bulk density were significantly (P<0.05) decreased, while the water content, total porosity, maximum moisture capacity, field water capacity and organic matter content were significantly (P<0.05) increased in the treatment of PC (covering and sorghum planting). The populations of culturable microorganism (soil bacteria, fungi, actinomycetes, cellulose decomposition bacteria and nitrogen fixation bacteria) were significantly (P<0.05) increased in the PC treatment. Before sorghum harvest, soil respiration intensity in the PC treatment was significantly (P<0.05) increased by 35.71% and 26.67%, respectively, as compared with NP and NPC. Surface biomass in the PC was 3.86 and 3.16 times higher than that of NP and NPC, respectively. In conclusion, sorghum planting efficiently improved soil quality and biological function, which provided an ecological and feasible way for agricultural utilization of land in new reclamation area.
陈立华, 苏伟霞, 姚宇阗, 郭士伟, 韩瑞, 尚辉, 周龙祥, 王栋, 张风革. 作物定植提升滨海盐土质量的研究——以覆盖条件下的甜高粱定植为例[J]. 中国环境科学, 2021, 41(5): 2336-2342.
CHEN Li-hua, SU Wei-xia, YAO Yu-tian, GUO Shi-wei, HAN Rui, SHANG Hui, ZHOU Long-xiang, WANG Dong, ZHANG Feng-ge. Crops planting on improvement of saline soil in coastal reclamation area: A case of sorghum planting under covering conditions. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(5): 2336-2342.
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