水稻生物学质量和营养与二化螟危害的关系

Relationship between biological quality and nutrition of rice and damage of Chilo suppressalis

在早晚稻的两系法杂交稻、三系法杂交稻和常规稻中各选1个品种(组合),通过测定各品种的各生物学质量指标和营养指标,研究3类型水稻品种(组合)对二化螟Chilo suppressalis(Walker)危害的影响。结果显示,二化螟的危害株率随水稻株高、外径的增加而加重;二氧化硅含量高的早稻品种和含量低的晚稻品种,二化螟危害重;还原糖和酪氨酸含量高的品种二化螟危害均重。早稻湘早籼24号、金优974和陆两优996的二化螟危害株率为0.33%、0.39%和0.72%,且随着株高的增加而增加,随着二氧化硅含量的升高而加重。晚稻湘晚籼12号、金优217和两优527的二化螟危害株率为0.42%、0.86%和1.25%,且随着外径的增加、还原糖含量和酪氨酸含量升高而增加,随着二氧化硅含量的降低而增加。表明通过水稻的生物学质量和营养指标的检测可判定水稻品种对二化螟的抗性。

Exploring the effect of the biological quality and nutrition of 3 types of rice to the damage of Asiatic rice striped borer,Chilo suppressalis（Walker）（CS）,we elected one variety from each two-line hybrid rice,three-line hybrid rice and conventional rice in the early rice and late rice.Through the determining of bio-quality indexes and bio-nutrition indexes,we analyzed the effect of 3 types of rice varieties to the damage and number of CS.The results showed the damage strain rate（DSR） of CS were positively correlated with rice plant height,external diameter.The varieties of high silica content in early rice and low silica content in late rice,high reducing sugar content,and high tyrosine content,the DSR of CS were high.In early rice,the DSR of CS of Xzx No.24,Jy974 and Lly996 is 0.33%,0.39% and 0.72%,it increases with the increasing of plant height and silica content.In late rice,the DSR of CS of Xwx No.12,Jy217 and Ly527 is 0.42%,0.86% and 1.25%,it increases with the increasing of external diameter and reducing sugar content and tyrosine content,with the reducing of silica content.So through the tests of bio-quality and nutrition indexes could infer the resistance to CS.