硒在水稻上的应用 Ⅲ.稻田土壤硒含量及施硒对水稻产量与米质的影响

Applied Research of Se on Rice Ⅲ Research of Influence on Rice Production and Qualitative of Se Content of Rice field Soil and by Applying Se

调查了湖南省１８个地（市）州、县（市）的４５个稻田土壤样品．稻田耕作层土壤中硒含量范围为０．０８～２．７８ｍｇ／ｋｇ，平均为０．４２７ｍｇ／ｋｇ．稻田施硒可以改变水稻的结实性状，并能提高水稻单产，但因地域不同、品种不同，增产的幅度有差异．施用微量硒一般能使水稻增产２．０５％～９．６７％．初步探明，水稻施硒与重金属等的存在有拮抗作用．土壤中硒含量丰富，稻米中的氨基酸的含量也相应提高．

We have investigated 45 samples of soil from 18 districts and countries in Hunan Province. Se contest in soil ranges from 0.08 to 2.78 mg/kg and the average amount is 0.427 mg/kg. Se content in soil closely relates to the Se content of rice. Applying Se to rice can improve proverties of fruits and increase yield. There are some distinguish in increasing extent by different regions and different kinds of rice. Applying slight Se commonly makes rice production improve 2.05%～9.67%. Preliminary research shows that heavy metals have some resistance to applying Se on rice. Amount of amino acid in rice will also relatively improve by applying Se on rice or because of abundant Se content in soil.