cje ›› 2012, Vol. 31 ›› Issue (11): 2810-2816.
• Articles • Previous Articles Next Articles
CHEN Dong-qing, ZHANG Rui, HUANGFU Chao-he**, JIANG Na, TU Chen-yang, YANG Dian-lin
Online:
Published:
Abstract: A pot experiment was conducted to investigate the roles of soil fungi on the invasion of Flaveria bidentis and to reveal the soil microbial mechanisms involved during this invasion. In the experiment, five levels of KH2PO4 (50 mg·kg-1 of CaSO4, P0; control, no P addition, P1; 20 mg·kg-1 of P, P2; 40 mg·kg-1 of P, P3; and 80 mg·kg-1 of P, P4) were applied, combining with applying fungicide benonyl to suppress soil fungi, aimed to understand the effects of applying P and benonyl on the invasion of F. bidentis. Applying fungicide had significant effects in decreasing the infection rate of AM fungi on F. bidentis, inhibiting the plant photosynthesis, and reducing the plant biomass, soluble sugar content, and protective enzymes (SOD, POD, and CAT) activities, while applying higher levels of P (P3 and P4) under the application of benonyl increased the plant total P content, but had minor effects on plant total N, soluble protein, and chlorophyll contents. The nutritional status of F. bidentis and the activity of AM fungi on F. bidentis varied with P addition levels. In treatments P0, P1, and P2, the contribution rate of soil fungi to the N and P uptake by F. bidentis was positive, but the opposite result was obtained in treatments P3 and P4. It was suggested that there was a significant interaction between soil fungi and P application levels, and the growth of F. bidentis could be promoted by soil fungi, especially by AM fungi, combining with appropriate P fertilization.
Key words: MODIS, fraction of absorbed photosynthetically active radiation, plant functional type, temporal and spatial variation, filtering of SavitzkyGolay.
CHEN Dong-qing, ZHANG Rui, HUANGFU Chao-he**, JIANG Na, TU Chen-yang, YANG Dian-lin . Effects of applying phosphorus and fungicide on the growth and physiological characteristics of Flaveria bidentis.[J]. cje, 2012, 31(11): 2810-2816.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: http://www.cje.net.cn/EN/abstract/abstract20503.shtml
http://www.cje.net.cn/EN/Y2012/V31/I11/2810