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首页> 外文期刊>Plant and Soil >Field screening of barley cultivars to soil salinity using a sprinkler and a drip irrigation system.
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Field screening of barley cultivars to soil salinity using a sprinkler and a drip irrigation system.

机译：使用喷头和滴灌系统对大麦品种对土壤盐分的田间筛选。

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摘要

The relationships between leaf ion concentration and grain yield was assessed in 18 barley cultivars and a comparison was made of their ranking for salinity tolerance established with a triple line source (TLS) sprinkler system, where the absorptionof salts is through the leaves and the roots, with that obtained with a drip irrigation (DI) system, where the absorption of salts is only through the roots. The saline solution in both systems was made up of sodium and hydrated calcium chloride (1:1 w/w). Except for the treatments with the highest salinity, direct leaf absorption of toxic Na+ and Cl- was minor or negligible, but it was substantial for Ca2+. Irrespective of barley cultivar and leaf age, the accumulation of Cl- in the TLS was 1.5-2.5 times greater than that of Na+. There was no significant correlation between grain yield and leaf sap ion concentration among the cultivars. Thus, leaf ion concentrations should not be used as screening tools in breeding programmes for increasing salinitytolerance in barley. The highest yielding cultivars under non-saline conditions were also most productive under moderately saline conditions, though not under high salinity conditions. Although grain yields in the TLS were substantially lower than in theDI, the salinity tolerances estimated in both systems were significantly correlated, indicating that the simple and inexpensive TLS irrigation system could be successfully used in screening for salinity tolerance in barley.
机译：在18个大麦品种中评估了叶片离子浓度与谷物产量之间的关系，并比较了使用三线源（TLS）喷淋系统建立的盐度耐受性等级，盐分的吸收通过叶片和根部进行，滴灌（DI）系统获得的盐分仅通过根部吸收。两种系统中的盐溶液均由钠和水合氯化钙（1：1 w / w）组成。除盐度最高的处理外，有毒的Na +和Cl-的直接叶吸收量很小或可忽略不计，但对Ca2 +而言是相当大的。不论大麦品种和叶片年龄如何，TLS中Cl-的积累量都是Na +的1.5-2.5倍。品种间籽粒产量与叶片汁液离子浓度之间无显着相关性。因此，叶离子浓度不应该用作育种程序中的筛选工具，以提高大麦的耐盐性。在非盐条件下，即使在高盐度条件下，最高产量的品种在中等盐度条件下也最有生产力。尽管TLS的谷物产量大大低于DI的产量，但两个系统中估计的盐度容忍度显着相关，这表明简单廉价的TLS灌溉系统可以成功地用于筛选大麦的盐度耐性。

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