土壤耕作层O2含量对黄瓜各生育期根系生长特性的影响

摘要

为研究土壤耕作层不同深度O2含量对黄瓜各生育期根系生长特性的影响,在大棚内采用不同增氧灌溉方式(A2:每2h加氧灌溉,A4:每4h加氧灌溉,A8:每8h加氧灌溉,CK:不加氧处理)对盆栽黄瓜各生育期进行增氧处理.测定土壤耕作层不同深度O2含量和黄瓜各生育期的根系活力、根系农艺性状、根系健康指数等指标.结果表明:1)根系活力、根系农艺性状、根系健康指数等指标在黄瓜幼苗期表现为A4＞A2＞A8＞CK,而初花期和结瓜期表现为A2＞A4＞A8＞CK.2)相关性分析表明,土壤耕作层O2含量与根系活力,根系农艺性状,根系健康指数呈显著正相关,且土壤耕作层O2含量与根系各指标相关系数:初花期＞结瓜期＞幼苗期.由此推断,土壤耕作层O2含量对黄瓜各生育期根系生长有重要影响,在黄瓜幼苗期适量的O2更利于根系的生长,而在初花期和结瓜期充足的O2能有效的促进根系生长.%To study the effects of oxygen content at different depth of soil magnetism on the physiological and biochemical characteristics of cucumber root,different aerobic irrigations (A2,increasing oxygen once every two hours;A4,increasing oxygen once every four hours;A8,increasing oxygen once every eight hours;CK,no oxygen increasing) were applied on each growth period of potted cucumber in green house at each growth period.O2 contents in soil magnetism at different depth were detected and the index of cucumber root activity,agronomic traits,health index were investigated.The results showed that:1)At seedling stage,the index of cucumber root was A4＞A2＞A8＞CK,and at flower stage and mature stages,the index of root was A2＞A4＞A8＞CK;2)Correlation analysis discovered that oxygen content in soil magnetism was positively related to the root activity,agronomic traits,the root health index relationship of cucumber.The correlation between oxygen content and the index of root showed flower stage＞mature stage＞seedling stage.In conclusion,the oxygen content in soil magnetism played an important role in the growth of cucumber root.At seedling stage,moderate oxygen level was more suitable for the growth of root.However,at flower and mature stages,sufficient oxygen was more effective on the growth of root.