模拟酸雨及其酸化土壤对小麦幼苗体内可溶性糖和含氮-应用生态学报.PDF

2005 8 16 8 CHINESE JOURNAL OF APPLIED ECOLOGY, Aug . 2005, 16( 8)∃1487~ 1492 * * * 童贯和 梁惠玲 ( , 232001) , N . , pH 5. 64. 53. 53. 0 2. 5 . pH 5. 6 2. 5 , pH 6. 06 3. 41, 56. 5 41. 1 mmol!kg- 1. , 5 pH , N , . , N . N ( NR) ( GOGAT ) . pH ∀ 3. 0 (T T ) 4 5 . N 100 1- 9332( 2005) 08- 1487- 06 X503. 231, X5 17, X53 A Effects of simulated acid rain and its acidified soil on soluble sugar and nitrogen contents of wheat seedlings. T ONG Gu nhe, LIANG Huiling (Dep artment of Biology and Chemistry , H uainan Teachers College, Huainan 232001, China). Chin.J. App l. Ecol . , 2005, 16( 8) : 1487~ 1492. The study show ed th t the c tion rele se of simul ted r in c used soil cidific tion nd b se ions rele se. Wit h the decre se of simul ted cid r in pH from 5. 6 to 2. 5, the cid r inle ched soil pH decre sed from 6. 06 to 3. 41, nd its tot l mount of exch nge b se ions decre sed from 56. 5 to 41. 1 mmol!kg- 1. Spr ying simul ted cid r in on the shoots of w he t seedlings pl nted on such cidified soils c used r pid decre se in the soluble sug r nd ni trogen contents of whe t seedlings, nd reduced some of their physiologic l ctivities. The effect of spr ying simu l ted cid r in on the soluble sug r , nitrogen, nd chlorophyll contents nd photosynthetic r te of whe t stems nd le ves w s l rger th n th t of cidified soil, while the effect of the l tter on t he soluble sug r nd nitrogen con tents nd the physiologic l ctivity of NR nd GOGAT in root system of w he t seedlings w s l rger th n th t of the former. T he intensive cid r in of pH ∀ 3. 0 nd th