含硅、钙土壤调酸剂应用于酸性水稻土的效果分析

连续两季施用含硅、钙土壤调酸剂,对湖北省水稻产区酸性水稻土基本理化性状和水稻产量进行评价。结果表明,施用不同量的含硅、钙土壤调酸剂对土壤的pH均有提高,提高值最高达0.29;土壤硅铝率提高0.23;对土壤阳离子交换量也有一定影响,增加幅度最高达1.90 cmol(+)/kg;对水稻结实率提高幅度达5.56%,千粒重增加0.73 g;对土壤容重及耕层有机质、全氮、碱解氮、有效磷等影响不大。表明在酸性较重土壤中施用含硅、钙土壤调酸剂可以改善土壤酸性、硅铝率和提高阳离子交换量,对土壤结构和其他养分含量影响不明显,对水稻增产效果明显。

Effect Analysis of Silicon and Calcium Soil Conditioner on Acid Rice Soil

In the two quarter,the acid rice soil physical and chemical properties and rice yield in Hubei province of rice producing areas were evaluated by using silicon and calcium soil conditioner. The results showed that the application of dif-ferent amount of containing silicon calcium improved the soil pH up to 0.29,increased the soil silicon aluminum ratio up to 0.23, had a certain effect of the soil cation exchange capacity and the increase up to 1.90 cmol (+)∕kg, increased the rice seed setting rate up to 5.56%,increased the grain weight up to 0.73 g,had litter effect of the bulk density of soil and the soil organic matter,total nitrogen,available nitrogen and available phosphorus etc. The results indicated that in heavy acidic soil application of silicon,calcium soil conditioner could improve the soil acidity,Si∕Al ratio and improve the cation exchange ca-pacity,which have litter obvious effect to the soil structure and other nutrient content, contrary to rice yield.