海南省主要河流及地下水硅含量的分布规律

通过分析海南省主要河流及地下水硅的含量,指出海南省主要河流及地下水硅含量的分布规律:总体上硅含量比较低,水稻等喜硅的植物应补充含硅的肥料或含硅的复合肥。三大河流中以万泉河流域河流及地下水水体中的二氧化硅含量最高,分别为11.60mg/L和9.81mg/L,以昌化江流域河流水体中的二氧化硅含量最低;南渡江流域地下水水体中的二氧化硅含量最低,与万泉河相比相差分别为61.8%和6.63%。总体上河流水体中的二氧化硅含量比地下水中的二氧化硅含量略低,为3.9%。相关分析知道,相关系数(r)0.588**(r*=0.349,r**=0.449,n=31);地下水二氧化硅含量的整体的变异比较小,变异系数(CV%)为41.1%,河流水体的二氧化硅含量变异程度则较大,变异系数(CV%)为54.4%。比较流域变化情况来看,南渡江流域二氧化硅含量变异最大,河流水体和地下水变异系数(CV%)分别为67.3%和60.3%。要准确地提出与海南省的实际情况吻合的水稻等农作物对应的水体中二氧化硅临界值,需进一步研究。

Distribution Pattern of Silica Concentration in Major Rivers and Their Ground Water in Hainan Province

This paper analyzes the silica concentration in the major rivers and their ground water in Hainan province and reveals the following distribution pattern: in general, the silica concentration is low, therefore rice and other crops which rely on silicon as one of the essential nutrients should get more silicon or silicon compound fertilizers; the silica concentration in Wanquan river and its ground water are the highest, 11.6mg/L and 9.81mg/L respectively, but that of Changhua Jiang and Nandu jiang ground water are lowest, and the differences between the highest and the lowest is about 61.8% and 6.63% respectively; the silica concentration in rivers is 3.9% lower than that in ground water. The correlation analysis shows that correlation coefficient is r**=0.588; the silica concentration in rivers are more likely to change than that in ground water, and the variation coefficient are 41.% and 54.4% respectively; the greatest variation is found in Nandu jiang river valley, river water and ground water, getting to 67.3% and 60.3% respectively. The paper concludes that the precise silicon value critical to rice and other corps should correspond with the value of available silicon in soil and the silicon content in plants and crop yield, but further studies should be made.