赤泥不同施用量对镉污染稻田水稻光合特性及产量的影响

Effect of Different Amounts of Red Mud on Photosynthetic Characteristics and Yield of Rice in Cd Polluted Soil

通过盆栽试验研究了赤泥不同施用量对镉污染稻田水稻光合特性及产量的影响。结果表明:赤泥施用量为50 g/盆时水稻产量达到最高,其主要作用是促进了水稻有效穗形成,提高了千粒重、结实率和每盆粒重等产量相关性状。同时得出:利用赤泥修复酸性土壤镉污染能改善稻田土壤生态环境,可实现水稻增产,但赤泥施用量要考虑水稻生长特性和栽培环境,适量施入。

Pot experiments were conducted to study the effect of different amounts of red mud on photosynthetic characteristics and yield of rice in Cd polluted soil.The results showed that rice reached the highest yield as application of red mud up to 50 g/pot.The main cause of yield promotion by red mud was that red mud is favor to form the rice effective ear and improve yield-related traits including panicle number per plant,seed setting rate and 1 000-grain weight.Meanwhile,it could be concluded that it was feasible for remediation of acidic soil contaminated by Cd using red mud to improve soil ecological environment,make the rice grow better,but the fittest usage of red mud should be considered growth characteristics and planting environment of rice.