剪除部分颖壳对宁夏水稻糙米生长发育的影响

Effect of Cutting Hull on Growth of Ningxia Brown Rice

在温室盆栽条件下,以粳稻普通稻宁粳28号和优质稻宁粳38号为材料,于开花后两天设剪壳、剪壳后套硫酸纸袋保湿透光、剪壳后套硫酸纸袋外再套牛皮纸袋保湿挡光及不剪壳4个处理,研究谷壳对糙米生长发育的影响。结果表明:①剪壳处理的糙米千粒质量低于不剪壳处理,但差异不显著。随着糙米生长发育进程的推进,差异显著性增大;②剪壳后套硫酸纸袋处理糙米的千粒质量显著高于不剪壳处理,并随着生长发育的推进,其差异增大;③剪壳后套硫酸纸袋再套牛皮纸袋处理的糙米千粒质量显著高于剪壳后套硫酸纸袋;④剪壳、剪壳后套硫酸纸袋、外再套牛皮纸袋处理对普通稻宁粳28号糙米千粒质量的影响大于优质稻宁粳38号;⑤谷壳对粳稻普通稻宁粳28号糙米生长发育的影响比对优质稻宁粳38号的明显。

Under greenhouse bonsai condition,pot experiment was carried out to investigate effect of hull on growth of brown rice, using Japonica cultivar ordinary rice Ningjing 28 and Japonica cultivar high quality rice Ningjing 38 as materials. Portion of hull was cut 2 days after flowering and 4 treatments were designed： cutting hull, cutting hull＋ covering transparent sulfuric acid paper, cutting hull ＋covering opaque sulfuric acid paper wraps kraft paper again, non-cutting. Relative humidity inside sulfuric acid paper and sulfuric acid paper wraps kraft paper again could be well kept. The results were as follows：（1） 1 000 brown rice weight in cutting hull treatment was lower than that of non-cutting treatment,but the difference was not remarkable. Along with unpolished rice growth advancement ,the difference became more significant as grain grew. （2） 1 000 brown rice weight in covering sulfuric acid paper treatment was significantly higher than that in non-cutting hull treatment and the difference between them became larger as grain grew. （3） 1 000 brown rice weight in covering sulfuric acid paper wraps kraft paper again treatment was much higher than that in covering sulfuric acid paper treatment. （4） 1 000 brown rice weight in Japonica cultivar ordinary rice Ningjing 28 was much more affected by cutting hull,, covering sulfuric acid paper and sulfuric acid paper wraps kraft paper again than that in Japonica cultivar high quality rice Ningjing 38. （5） Growth of brown rice was more significantly limited by hull in Japonica cultivar ordinary rice Ningjing 28 than that in Japonica cuhivar high quality rice Ningjing 38.