哈尔滨市香坊区黑土型水稻土可溶性硅受环境因子的影响研究

Effect Study on Environment Factors of Paddy Phaeozem Soluble Silicon in Xiangfang District of Harbin City

研究黑土型水稻土可溶性硅受环境因子的影响,结果表明：无作物条件下温度、pH值和浸水方式均能对土壤可溶性硅的释放产生影响。环境温度的升高有利于土壤可溶性硅的释放,在5-40℃范围内,温度每提高1℃,黑土型水稻土中可溶性硅的释放量增加0.64mg/kg。当pH值在4.5-9.0范围内,黑土型水稻土中可溶性硅释放随p H值的升高呈下降趋势。土壤可溶性硅浓度随持续浸水时间的增加呈先增加后降低的趋势,在持续浸水20 d达到最大值,为53.87 mg/kg,且较持续浸水10 d提高了12.91%。持续浸水20 d后土壤可溶性硅浓度开始下降,到第50天土壤可溶性硅下降到17.78 mg/kg。采用间歇浸水,土壤可溶性硅浓度稳定在32.57-38.32 mg/kg之间,表明间歇灌水的方式有利于持续稳定地供给水稻生产过程中对可溶性硅的需求。

The effect of environment factors on soluble silicon in paddy phaeozem was studied.The results showed that the temperature,p H value and water immersion method could affect the release of soluble silicon in soil.The increase of ambient temperature was conducive to the release of soluble silicon in soil.In the range of 5-40 ℃,temperature increased per 1 ℃,the leaching of soluble silicon increased 0.64 mg/kg in soil.This study showed that p H = 4.5 -9.0,soluble silicon was decreasing with p H increasing.Soluble silicon concentration presented a trent that increased first and then decreases with increase of immersion time,after flooding 20 days the value of soluble silicon reached 53.87 mg/kg that was more 12.91% than 10 days treatment.But more than 20 days,the long-term soaking made the concentration of soluble silicon decrease,50 days,soil soluble silicon decreased to 17.78 mg/kg.Intermittent flooding,the soil concentration of soluble silicon was 32.57 -38.32 mg/kg,a steady release rate of soil soluble silicon.The results showed that intermittent irrigation manner was conducive to the leaching of soil soluble silicon.