摘要
滩涂盐碱地脱盐是促进地区农业发展、保障耕地占补平衡的重要举措。本文以江苏如东滩涂围垦区为研究区,通过田间试验,研究滨海盐碱地改良过程中土壤水盐动态。结果表明:PAM改良剂(P)处理的土体含水率在燕麦整个生育期内保持较高水平;秸秆覆盖(F)处理的表层土壤含水率在燕麦抽穗期和成熟期明显下降。P、F处理的脱盐效果显著,有机肥(M)和对照(C)处理在燕麦成熟期的返盐表聚现象明显。对比各时期C处理表层土壤含盐量(4.38 g kg^-1~22.07 g kg^-1),其他三种处理的表层土壤脱盐效率为F(53.91%~85.66%)> P(41.22%~76.20%)> M(8.99%~61.48%)。在本试验的处理措施中,土壤PAM改良剂在滩涂围垦区土壤持续脱盐保墒方面效果较好,其次为秸秆覆盖,单一施用有机肥的改良效果较差。
Desalination of coastal saline-alkali soil is a significant measure for promoting regional agricultural development and protecting cultivated land requisition-compensation balance. The field experiments were carried out in coastal mudflat of Rudong, Jiangsu Province to study the dynamics of soil water and salt contents under different improvement measures. The results showed that the soil water content with the PAM amendment(P) maintained at a high level throughout the growth period of oats, while the soil water content of surface soil with burial straw mulching(F)decreased rapidly during the heading and maturity stages of oats. The treatments of P and F had remarkable desalination effects onsurface soil, while the soil salt content underthe application of organic manure(M) and control(C)was increased and accumulated on the surface soil evidently during oat maturation period. Compared with the salt content in the C treatment(4.38 g kg^-1-22.07 g kg^-1), the desalination efficiency of surface soil in each treatment decreased as F(53.91%~ 85.66%)> P(41.22%~ 76.20%)> M(8.99%-61.48%). Among the four treatments, PAM amendment showed a better effect on soil desalination and water retention, followed by straw mulching, whereas the effect of organic manure treatment was poor.
作者
沈洪运
解雪峰
濮励杰
朱明
黄思华
阚博颖
魏文杰
SHEN Hong-yun;XIE Xue-feng;PU Li-jie;ZHU Ming;HUANG Si-hua;KAN Bo-ying;WEI Wen-jie(School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China;Key Laboratory of the Coastal Zone Exploitation and Protection, Ministry of Land and Resources, Nanjing 210023,China;East China Mineral Exploration & Development Bureau for Non-Ferrous Metals, Institute of Geochemical Exploration and Marine Geological Survey, Nanjing 210007, China)
出处
《土壤通报》
CAS
CSCD
北大核心
2019年第2期316-322,共7页
Chinese Journal of Soil Science
基金
国土资源部公益性行业科研专项(201511086)资助
关键词
滩涂围垦区
改良
土壤水盐
燕麦
Coastal reclamation area
Improvement
Soil water-salt
Oats
