摘要
在盆栽条件下，生长在滨海脱盐土上的猕猴桃出现明显盐害反应；当土壤含盐量（ＮａＣｌ）达０．２％时，毛桃和葡萄植株生长受到明显抑制；达０．３％～０．４％时，银杏和石榴生长才受抑制。银杏、石榴根系木质部氯含量较韧皮部低，而根颈附近地上部木质部氯含量也比地下部低。桃树正好相反。银杏体内氯含量根冠比约为２，而葡萄几乎不高于１，石榴则随土壤含盐量增加氯含量根冠比增加。脱落的银杏叶片的氯含量分别为葡萄和桃的３．５～５．６倍和２．５～３，５倍。银杏和石榴耐盐可能与其具有某种减少氯进入体内和向地上部运输的机制有关，且银杏可利用老叶脱落向体外排出较多的氯。
Under pot-culture condition, kiwifruit plants growing on coastal desalting soil ob-viously appeared salt injury.The growths of peach and grapevine were inhibited as soil NaClcontent was up to 0.2%,Whereas ginkgo and pomegranate survived on soil containing 0.4%NaCl.Analysis Showed that Cl-content in the root xylem of ginkgo and pomegranate waslower than that in the root phloem,and that of the shoot xylem adjacent to the crown ofroots was lower than that of root xylem. The root/shoot ratio of Cl content in ginkgo wasnear 2,but that in grape was not more tha 1 in general In pomegranate, it increased withincreasing salt content in soil.The chloride content of fallen leaf of ginkgo was 3.5～5.6 and2.5～3;6 times as much as that of grapevine and peach respectively.Thus,the salt toleranceof ginkgo and polnegranate might have relation to the restriction of Cl entrance into plantsand transportation to shoots from roots. In addition, ginkgo could remove' more Cl fromplant by leaf falling.
出处
《中国南方果树》
1996年第4期34-38,共5页
South China Fruits
基金
国家自然科学基金
关键词
果树
耐盐性
氯离子
分布
Fruit trees
Salt tolerance
Chlorine ion
Distribation
