含盐土壤水-氮耦合与油葵优质品质指标间典型相关性分析

THE TYPICAL CORRELATION ANALYSIS BETWEEN THE QUALITY OF SOIL SUNFLOWER AND WATER-NITROGEN COUPLING IN THE SALINE SOIL

本文旨在分析含盐土壤水-氮耦合与表征油葵优质的主要品质指标间的典型相关关系。选取研究区-内蒙古河套灌区广泛种植的油料向日葵杂交品种康地T562为研究对象,分别于2011-2012年在研究区轻度与中度含盐土壤上展开2年的野外大田试验。表征油葵优质的品质指标主要为含油率、主要不饱和脂肪酸组分含量、蛋白质含量等。文中以上述各品质指标对应的产量信息（单位：kg.hm-2）为研究对象,规避水土环境因子对不同优质指标（相对于油葵籽仁干基的含量指标,单位：%）及油葵产量间的影响规律不一致及错综复杂的内在关系,对影响其优质的主要外在水土环境因子（灌水、施N肥量、现蕾-开花期土壤盐分含量）与上述品质指标之间进行典型相关性分析,从宏观上、整体的角度揭示两因子集团间的相关关系。结果表明,盐分对含盐土壤上表征油葵优质的综合品质指标对应的产量信息影响十分显著。在中度含盐土壤上,由于盐分划分等级间数值差距较大,使得盐分对表征油葵优质的综合信息的影响几乎超过不同年份下气候条件的影响。而实施不同的灌水量与施N肥量,对油葵优质综合信息的影响均没有不同种植年份的气候条件显著。研究表明相对于灌水与施N肥,表征油葵优质的品质指标对应的产量信息对油葵现蕾-开花期土壤盐分含量最敏感。本研究可为盐渍化灌区优质油葵产业的发展提供技术支撑与具体水肥管理参数。

In this paper,the test variety is Kangdi-T562 that is the hybrid of oil sunflower. A two-year field study was conducted in the light saline soil and moderate saline soil of Hetao irrigation district during 2011-2012.The indexes that indicate oil sunflower quality are oil content,the content of unsaturated fatty acids and protein content. The corresponding yield information of these quality indexes（ unit： kg / hm-2） are the research object. The typical correlation analysis was performed between the main external soil and water environmental factors（ irrigation,the amount of N fertilizer applied,soil salt content during the budding-flowering. So,This paper avoid the complex internal relations between the main external environmental factor of soil and water and the main quality indexes of oil sunflower（ the content index,%）,and the relation between the main external environmental factor of soil and water and the yield of oil sunflower. This paper revealed the relationship between external soil and water environmental factors group and high quality factors group of oil sunflower from the macro and whole point of view. The results show that soil salinity has the significant effect on the corresponding yield information of oil sunflower quality.In moderate salt soil,the effect of salinity on comprehensive information indicated of oil sunflower quality almost exceed the effect produced by the climatic conditions of different years. The effect produced by different amount of irrigation and N fertilizer applied wasn＇t more significant than the effect produced by the climatic conditions of different planting years. The yield information corresponding to the quality indexes of soil sunflower was more sensitive to the soil salt content during the budding-flowering of oil sunflower.This study can provide technical support and specific management parameters of water and fertilizer for the development of oil sunflower industry in the salinization district.