[1]张蛟,冯芝祥,崔世友,等.滩涂垦区不同盐分水平土壤的盐分动态及土壤因子变化[J].江苏农业学报,2017,(04):836-842.[doi:doi:10.3969/j.issn.1000-4440.2017.04.017]
 ZHANG Jiao,FENG Zhi-xiang,CUI Shi-you,et al.Seasonal variations of soil salinity and soil factors in reclamation area of tidal flats with different salinity levels[J].,2017,(04):836-842.[doi:doi:10.3969/j.issn.1000-4440.2017.04.017]
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滩涂垦区不同盐分水平土壤的盐分动态及土壤因子变化()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2017年04期
页码:
836-842
栏目:
耕作栽培·资源环境
出版日期:
2017-08-30

文章信息/Info

Title:
Seasonal variations of soil salinity and soil factors in reclamation area of tidal flats with different salinity levels
作者:
张蛟1冯芝祥2崔世友1翟彩娇1
(1. 江苏沿江地区农业科学研究所,江苏南通226541;2.江苏省如东县气象局,江苏如东226400)
Author(s):
ZHANG Jiao1FENG Zhi-xiang2CUI Shi-you1ZHAI Cai-jiao1
(1.Institute of Agricultural Sciences of Jiangsu Changjiang River Bank District, Nantong 226541, China;2.Rudong Meteorological Observatory, Rudong 226400, China)
关键词:
盐碱土滩涂围垦盐分动态土壤因子
Keywords:
saline alkaline soiltidal flat reclamationsoil salinity dynamicssoil factor
分类号:
S156.4+2
DOI:
doi:10.3969/j.issn.1000-4440.2017.04.017
文献标志码:
A
摘要:
为探明滩涂新围垦区不同盐分水平土壤的盐分季节性变化规律的差异性,以及土壤盐分与土壤因子之间的关系,2014年5月-2015年5月,在江苏省沿海滩涂围垦区,设置不同盐分水平(低盐,含盐量0.1%~02%;中盐,含盐量0.5%~07%;高盐,含盐量1.0%以上)的田间试验,监测了土壤电导率(EC1∶5)和土壤因子(0~400 cm)的季节性动态变化。结果表明:(1)高盐土壤盐分具有明显的季节性变化规律,表现为6-8月雨季土壤EC1∶5降到最低值254 dS/m,9-12月积盐作用明显,且在10月EC1∶5达到最大值6.49 dS/m;中盐土壤盐分具有一定程度的季节性变化规律,表现为在10-12月具有明显的积盐效果,且在10月EC1∶5达到最大值390 dS/m;低盐土壤盐分没有明显的季节性变化规律。(2)不同盐分水平下,土壤水分和pH1∶5值(除高盐土壤外)均没有明显的季节性变化规律。(3)滩涂围垦地区,在 0-400 cm土层中,土壤EC1∶5与pH1∶5值之间有极显著的负相关(P<001),而与土壤水分含量和土壤温度均没有明显的相关性。总之,该地区土壤盐分水平越高,雨季土壤表层脱盐越明显,秋季和初冬季节积盐越明显。因此,在滩涂围垦区农业利用时,应在雨季前(3-5月)或秋季前(8-9月)采取人为措施(如秸秆覆盖等),加速土壤降盐或控盐,以达到农作物生产的要求。
Abstract:
To elucidate the difference in the seasonal variations of soil salinity in reclamation area and explore the relationship between soil salinity and soil factors, a field experiment was conducted in the typical reclamation area of tidal flats in Rudong, Jiangsu province. Three levels of salinity were set: low salinity (LS, 0.1%-02%), medium salinity (MS, 0.5%-0.7%), and high salinity (HS, more than 1.0%). Soil electrical conductivity (EC1∶5) and soil factors (soil moisture, pH and temperature in the depth of 0-40 cm) were determined from May 2014 to May 2015. Soil salinity exhibited a strong seasonal pattern in the HS treatment with the lowest EC1∶5 254 dS/m in rainy season from June to August and the highest EC1∶5 6.49 dS/m in October. A seasonal change was shown in the MS treatment as well, with obvious salt accumulation from October to December and the highest EC1∶5 3.90 dS/m in October. No significant seasonal change was found in LS treatment. Soil moisture and soil pH1∶5 had no significant seasonal pattern in MS and LS treated soils. Soil EC1∶5 showed a negative correlation with soil pH1∶5 at depth of 0-40 cm (P<0.01) but no correlation with soil moisture and soil temperature in all plots. In a word, the higher the soil salinity in the reclamation area, the more obvious the soil desalination in rainy season and the salt accumulation in autumn and early winter. Therefore, to meet the demand of crop production,some artificial measures such as straw mulching should be adopted to promote desalination before rainy season or autumn.

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备注/Memo

备注/Memo:
收稿日期:2017-02-14 基金项目:江苏省自主创新基金探索性项目[CX(14)5096]; 南通市科技项目-应用基础研究项目(MS12016047) 作者简介:张蛟(1987-),男,陕西渭南人,硕士研究生,助理研究员,主要研究方向为沿海滩涂土壤改良与高效利用。(Tel)0513-87573485;(E-mail)zhangjiao0609@126.com 通讯作者:崔世友,(E-mail)cuisy198@163.com
更新日期/Last Update: 2017-09-01