摘要
在盆栽条件下,应用同位素示踪法研究稀土对水稻营养效应的影响。结果表明,水稻分药盛期和孕穗期各喷施100ppm 稀土溶液1次,可分别提高水稻吸收磷肥和土壤中磷量73.4%和32.6%;提高光合强度153.96%;吸收总氮量提高52.5%,产量增加62.32%。
Nutritive effect of rare-earth on rice was studied with the tracermethod on the condition of potculture.The results showed that sprayingrare-earth solution at the manimum tillering stage and boot stage wasable to promote absorption of phosphoric fertilizer and P_2 O_5 in thesoil.At the boot stage,absorptive amount of phosphoric fertilizer andP_2 O_5 in the soil increased by 73.4% and 32.6% respectively,comparedwith the control.Spraying method also increased the photosynthetic rate and was ben-efitial to the transportation of assimilates into seeds.At the boot stage,the photosythetic rate of the treatment(100 ppm)increased by 153.96%,compared with the control,that reaching the extremely significant diffence.The rare-earth also improved absorption of nitrogen element.The totalnitrogen amount of the treatment(100 ppm)increased by 52.3%.The riceyield of treatment increased by 62.32%,compared with the control.
出处
《西南农业大学学报（自然科学版）》
CSCD
1990年第2期189-191,共3页
Journal of Southwest Agricultural University
关键词
水稻
稀土化合物
植物营养
lowland rice
rare earth compound
plant nutrition
