CAJ | 학술논문

[目的]为了解在蔬菜漂浮育苗系统中,采用不同酸调节溶液pH是否会对蔬菜根系及其它生长指标产生不同影响。[方法]分别采用硝酸和硫酸调节生菜（Lactuca sativa）漂浮育苗系统中不同营养液浓度下的溶液pH,观察两种酸对生菜根系形态的影响。[结果]不同营养液浓度下,两种酸对根系的影响效果不同。硝酸处理下,随着营养液浓度的增加,生菜地上部、根部生物量都增加,当营养液EC达到1.0μs/cm时,生菜地上部、根部鲜重显著高于硫酸处理;硫酸处理下,当营养液EC达到0.8μs/cm时,生菜的总根长达到344.8 cm,根总表面积为40.9 cm2,投影面积为13.0 cm2,根体积为0.4 m3,显著高于硝酸处理下的相应根系形态指标。比较同一营养液浓度下两种酸的处理效果发现,硫酸处理增加生菜根冠比,促进总根长、根表面积等根系形态的生长;硝酸处理促进生菜地上部生长、促进侧根发育、提高移苗效率、移苗后利于实现高产。[结论]该研究为生菜等蔬菜漂浮育苗和集约化穴盘育苗营养调控技术奠定理论基础。
[목적]위료해재소채표부육묘계통중,채용불동산조절용액pH시부회대소채근계급기타생장지표산생불동영향。[방법]분별채용초산화류산조절생채（Lactuca sativa）표부육묘계통중불동영양액농도하적용액pH,관찰량충산대생채근계형태적영향。[결과]불동영양액농도하,량충산대근계적영향효과불동。초산처리하,수착영양액농도적증가,생채지상부、근부생물량도증가,당영양액EC체도1.0μs/cm시,생채지상부、근부선중현저고우류산처리;류산처리하,당영양액EC체도0.8μs/cm시,생채적총근장체도344.8 cm,근총표면적위40.9 cm2,투영면적위13.0 cm2,근체적위0.4 m3,현저고우초산처리하적상응근계형태지표。비교동일영양액농도하량충산적처리효과발현,류산처리증가생채근관비,촉진총근장、근표면적등근계형태적생장;초산처리촉진생채지상부생장、촉진측근발육、제고이묘효솔、이묘후리우실현고산。[결론]해연구위생채등소채표부육묘화집약화혈반육묘영양조공기술전정이론기출。
[Objective] The aim was to investigate different effects of two pH-regulating acids on the root morphology and other physiological growth of Lactuca sativa L.in floating plug transplant system.[Method] HNO3 and H2SO4 were used to adjust pH condition of various nutrient concentrations in lettuce floating transplant system,the effect of two acid treatments on root traits of lettuce were investigated.[Result] These two acids made different effects on root system under a series of nutrient gradients.Under HNO3 treatment,the fresh weight of shoot and root were increased with growth of nutrient concentration;root preformed best when EC was 1.0 μs/cm.Under H2SO4 treatment,when EC was 0.8 μs/cm,the total root length and root surface area,projected area,root volume of lettuce were 344.8 cm,40.9 cm2,13.0 cm2,0.4 m3,respectively,which were significantly higher than those in HNO3 treatment.Compared the influences of acid treatments under same nutrient concentration,the result showed that H2SO4 treatment increased root/shoot ratio and all other root morphological characteristics;however,HNO3 treatment promoted the growth of shoot and lateral root,increased transplanting efficiency and facilitated realizing high yield after transplanted into open-field.[Conclusion] This study will provide theoretical reference for improving plug transplant technology of lettuce.