改良剂与水分对荒漠锦鸡儿生长与生理特性的影响

Effects of Improvers and Moisture on Growth and Physiological Characteristics of Caragana roborovskyi

【目的】研究适宜荒漠锦鸡儿幼苗在盐碱地中生长的改良,加快荒漠锦鸡儿在新疆盐旱逆境下的推广应用。【方法】以两年生荒漠锦鸡儿幼苗为材料,采用水分与改良剂正交设计进行大田试验,研究盐碱地中不同土壤水分条件和3种改良剂对荒漠锦鸡儿幼苗的生长和生理特性的影响。【结果】经改良剂和水分处理后的荒漠锦鸡儿幼苗生长和生理指标总体较对照好。在偏干旱(180.3 mm)环境下,施加以腐殖酸、水溶性有机酸为主要成分的改良剂效果最好,高于其对照的株高增长量(2.46 cm)、地径增长量(0.53 cm)主根长(12.63 cm)及生物量的增长,能显著提高幼苗抗氧化系统酶的活性,减少丙二醛的积累(46.3%)。【结论】施用以腐殖酸、水溶性有机酸为主要成分类改良剂可以有效促进幼苗生长,可应用于荒漠锦鸡儿在干旱盐碱区的苗木管理。

【Objective】 To screen suitable improvement schemes for the growth ofCaragana roborovskyi seedlings in saline-alkali soil, so as to accelerate the popularization and application ofC. roborovskyi seedlings under salt-drought stress.【Method】Field experiments were conducted to study the effects of different soil moisture conditions and three improvers on the growth and physiological characteristics ofC. roborovskyi seedlings in saline-alkali soil by using the orthogonal design of water and amendments.【Result】The growth and physiological indexes ofC. roborovskyi seedlings treated with modifier and water were significantly better than those of the control. In a drought-prone(180.3 mm) environment, the application of humic acid and water-soluble organic acid as the main components of the modifier had the best effect, which were higher that those of the control in plant height(2.46 cm), ground diameter(0.53 cm), main root length(12.63 cm). At the same time, the activities of antioxidant enzymes in seedlings were significantly increased, and the accumulation of malondialdehyde was reduced(46.3%).【Conclusion】The application of humic acid and water-soluble organic acid as main component improvers can effectively promote seedling growth and can be applied to the management ofC. roborovskyi seedlings in arid saline-alkali areas.