为促进滨海区域粮食生产，以盐渍化麦田为研究对象，在测定土壤（0～20 cm）基本性质及小麦产量、生物量基础上，分析土壤肥力特征与小麦生产能力间的关系。结果表明，土壤含盐量与小麦产量、地上部生物量（生物量）呈极显著负相关（p＜0.01），其关系符合三次函数方程。若以4 500 kg hm-2作为最低目标产量，土壤含盐量应在3.1 g kg-1以下。土壤有机质含量与土壤含盐量呈显著负相关（p＜0.05），与小麦产量、生物量呈极显著正相关（p＜0.01）。土壤有机质含量增加能够降低盐渍化程度，促进小麦生产。将直接相连的下层（＞10～20 cm）与上（表）层（0～10 cm）土壤含盐量比值作为抑盐效率（E ），来评价有机质的抑盐作用，表层土壤有机质含量与E 符合二次函数方程，有机质含量超过19.1 g kg-1时，抑盐效果显著，可以作为土壤肥力培育目标值。此外，提高土壤速效钾含量对小麦生产也具有显著促进作用。研究结果对研究区域及相似地区进行土壤肥力培育和粮食生产具有重要意义。
To boost food production in coastal regions, a study was carried out to analyze relationships between soil properties and wheat production. For that end, soil samples were collected in the soil layer (0~20cm) of salinized wheat fields for determination of soil physicochemical properties, and wheat yield and biomass of the sampling sites were monitored. Results show that yield and biomass of wheat was significantly and negatively related to soil salt content (p<0.01), and the relationsip fitted a cubic equation well. If 4 500 kg hm-2 was set as the minimum target yield, salt content in the soil should be lowered below 3.1 g kg-1. Soil salt content was significantly and negatively related to organic matter content in the soil, while yield and biomass of the wheat crop was significantly and positively related to that (p<0.01), which suggests that increasing soil organic matter content can reduce soil salt content and boost wheat production. To evaluate of effect of soil organic matter suppressing soil salinity, ratio of soil salt content in the sub-surface soil layer (>10~20 cm) to that in the surface layer (0~10 cm) was used as salinity suppressing efficiency (E ). The relationship between E and organic matter content in the surface soil fitted a quadratic functional equation well. The effect of organic matter on suppressing soil salinity became obvious, when soil organic matter content in the surface soil was increased up to or higher than 19.1 g kg-1, which can, therefore, be set as a target value for soil fertility building of saline soil. Besides, increasing soil readily available K content can significantly boost wheat production, too, in saline soil. In a word, the findings of this study are of great significance to soil building and grain production in the studied and similar regions.
谢文军,张衍鹏,张 淼,李 蕊,武兰芳,欧阳竹.滨海盐渍化土壤理化性质与小麦生产间的关系[J].土壤学报,2015,52(2):461-466. DOI:10.11766/trxb201405120229 Xie Wenjun, Zhang Yanpeng, Zhang Miao, Li Rui, Wu Lanfang, Ouyang Zhu. Relationships between soil physicochemical properties and wheat production in coastal saline soil[J]. Acta Pedologica Sinica,2015,52(2):461-466.复制