温室环境对黑心菊生长影响的实验研究.pdfVIP

33 9 () Vol.33 No.9 2005 9 J. Huazhong Univ. of Sci. Tech.( Nature Science Edition) Sep. 2005 农业气象仪：/ 1, 2 1 2 范爱武 刘 伟 李光正 ( 1 华中科技大学能源与动力工程学院, 湖北武汉430074; 2 华中科技大学 土木工程与力学学院, 湖北武汉430074) : , , .: 72. 7 %39.2 %; ,36.4 %48. 0%. , . ,; ,. : ; ; ; ; : TK124; S31 : : 1671-4512( 2005)09-0062-03 Experimental study on the inf luence of greenhouse environment on the growth of Rudbeckia hirta Fan A iw u L iu Wei L i Guangz heng Abstract: The influence of greenhouse environment on the growth of in Rudbeckia hirta, a biennial herba- ceous flower was studied through comparative experiments conducted in a greenhouse and in the open air. T he results showed that the mean wet weight and dry weight of the over-ground parts of the indoor plants were heavier than thoseof theoutdoor plants by 72. 7% and 39.2 %, respectively; whereas themean wet weight and dry weight of theroot systems of the indoor plants were lighter than thoseof the outdoor plants by 36. 4% and 48.0% , respectively. Moreover, the indoor plants had arelatively smaller roots/ canopy ra- tio in comparison with the outdoor plants. ll the results indicated that the greenhouse environment en- hanced the absorption activity of the root system and was propitious to the growth of the over-ground part of plants. On the other hand, the plants did adaptation reaction to harmful outdoor environment through function compensation to lighten the menace action of adversity. Key words: greenhouse; Rudbeckiahirta; roots/ canopy ratio; atmospheric temperature; soil temperature Fan Aiwu Dr. ; Collegeof Energy Power Eng. , Huazhong Univ. of Sci. Tech. , Wuhan 430074, China.