不同叶面肥喷施对茄子幼苗生长及光合特性的影响研究

Effects of Spraying Different Foliar Fertilizers on the Growth and Photosynthetic Characteristics of Eggplant(Solanum melongena L.)Seedlings

为探明不同叶面肥对茄子幼苗生长发育及光合作用的影响,以‘京茄黑龙王’茄子为试材,自三叶一心开始分别于叶片正反面喷施清水(CK),常规叶面肥(0.1%尿素+0.2%磷酸二氢钾,T1),0.1、0.05 g/L的腐植酸(T2、T3),0.03、0.015 g/L的复合有机酸(T4、T5)。结果表明:与CK相比,喷施常规叶面肥、腐植酸和复合有机酸可促进茄子幼苗株高、叶面积生长,增加叶片数,以T3、T5处理效果增加幅度最大。各处理促进了茄子幼苗干物质的积累量,以T2处理最佳。T3、T5处理下叶绿素a含量增加幅度较大,分别较CK增加32.6%、33.7%。喷施腐植酸增加了叶绿素b含量,喷施复合有机酸增加了类胡萝卜素含量。

The effects of different foliar fertilizers on eggplant seedlings’growth,development and photosynthesis were determined by taking‘Jingqie Heilongwang’eggplant as the test material.The fertilizers were sprayed on the front and back sides of the leaves at three true leaf stage,taking water as control(CK),conventional foliar fertilizer(0.1%urea+0.2%potassium dihydrogen phosphate)as T1,0.1 g/L and 0.05 g/L humic acid as T2 and T3,0.03 g/L and 0.015 g/L compound organic acid as T4 and T5.The results showed that compared with CK,the eggplant plant seedling height,leaf area growth and number of leaves were promoted by spraying conventional foliar fertilizer,humic acid and compound organic acid.The increasing effect of T3 and T5 treatments were the best.T1-T5 treatments promoted the dry matter accumulation of eggplant seedlings,and T2 was the best.The chlorophyll a content increased significantly under T3 and T5 treatments,which was 32.6%and 33.7%higher than that of CK respectively.Spraying humic acid increased the content of chlorophyll b,and spraying compound organic acid increased the content of carotenoid.