土壤酸化对双季早、晚稻产量的影响曾勇军.pdfVIP

作物学报 ACTA AGRONOMICA SINICA 2014, 40(5): 899−907 / ISSN 0496-3490; CODEN TSHPA9 E-mail: xbzw@ DOI: 10.3724/SP.J.1006.2014.00899 土壤酸化对双季早、晚稻产量的影响 曾勇军 周庆红 吕伟生 谭雪明 潘晓华 石庆华* / / , 330045 : pH , pH pH , pH , , , , pH 4.5 , pH 5.0 , , 7.82%, 8.06%; pH 3.5 , pH 4.5 , , , : ; ; ; Effects of Soil Acidification on the Yield of Double Season Rice ZENG Yong-Jun, ZHOU Qing-Hong, LÜ Wei-Sheng, TAN Xue-Ming, PAN Xiao-Hua, and SHI Qing-Hua * Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education / Key Laboratory of Crop Physiology, Ecology and Ge- netic Breeding of Jiangxi Province / Jiangxi Agricultural University, Nanchang 330045, China Abstract: Soil pH is one of the important factors affecting rice growth and development, but little is known about the impact of soil acidification on the yield of double season rice. In the pot experiment, sulfuric acid was added to the soil and low pH water was used for irrigation after transplanting. The results showed that with the decrease of soil pH the plant growth duration extended, the dry mass accumulation and the grain yield decreased in double season rice. When the pH of irrigated water lowered than 4.5 and soil pH lowered than 5.0, the yield of double season rice decreased significantly, by 7.82% for early season rice and by 8.06% for late season rice. When the pH of irrigated water lowered than 3.5 and the soil pH lowered than 4.5, the yield of double season rice decreased even more sharply. Under the condition of soil acidification, the early tillering fo