不同供硫水平对水稻生长和养分吸收的影响

为探明硫素对水稻生长的影响和水稻吸硫特性,进行水培试验。结果表明,缺硫导致水稻生长明显受阻,生育推迟,抽穗结实不良,根量少,根细长。随着施硫量的增加,水稻产量随着增加,当硫肥浓度超过0.180mmol/L时,各处理的千粒重、结实率就不再增加,表明当培养液的硫浓度≥0.180mmol/L时可满足水稻金优82正常生长的需要。无硫处理的水稻最终没有结实。水稻地上部和根系的含硫量随着施硫量的增加而提高,它们之间的差异达到极显著水平。成熟收获后,植株和根系氮、磷、钾含量随着硫肥供应量的增加有下降的趋势;随着供硫水平提高,谷粒的硫含量增加,当供硫浓度达0.18mmol/L时谷粒硫含量不再增加;而谷粒氮、磷、钾含量也有上升的趋势。

Effect of Different Levels of Sulfur on Rice Growth and Nutrients Absorption

In order to prove pot experiment was carried up effect of sulfur on rice growth and sulfur absorption character of rice, water through. The results showed that lack sulfur suffocated rice growth obviously, put off procreation and resulted in badness of tassel and seed, the amount of root was little and root was slightness. The more sulfur applied, the higher output of rice increased. 1000 kernel weight and seed rate increased no more as soon as sulfur was applied beyond 0.180 mmol/L, which indicated that rice JinYou82 can grew in gear when sulfur content in culture solution 90.180 mmol/L. Rice was no seed when no sulfur was supplied. With sulfur was supplied, sulfur content in stem and leaf of rice and root increased, difference of which was significant. N, P and K contents in plant and root decreased after harvest. Sulfur content in grain increased with sulfur was supplied, which increased no more with 0.18mmol/L sulfur was supplied. N, P and K contents in grain have trend for increasing too, which was different to that in stem and leaf.