稻曲病菌球数量及发生位置对北方常规粳稻产量和品质的影响

选用感稻曲病品种辽粳401为研究对象，分析单穗上菌球数量以及菌球所在位置对水稻产量、加工品质、蒸煮食味品质的影响。结果表明，辽粳401单穗上菌球的数量以1～3个为主，随着单穗菌球数量增加，产量和品质逐渐降低，产量降低2.71%～35.47%，垩白粒率增加7.02%～94.90%，整精米率降低0.81%～13.18%。综合水稻产量和稻米品质数据发现，稻曲球对辽粳401的影响以单穗上产生3、6、9个菌球为分界点。产生在辽粳401穗位上部的菌球对稻米产量和品质影响大于产生在穗位中部和下部的菌球，穗位上部产生3个稻曲球可以造成辽粳401产量损失18.56%。

Effects of the Number of Rice False Smut Balls and the Position of the Diseased Ear on Yield and Quality of Northern Japonica Rice

The rice smut susceptible variety Liaojing 401 was selected as the research material to analyze the effects of the number and the location of fungal balls on a single ear on the yield, processing quality, cooking and eating quality of rice. The results showed that the number of fungi balls per ear of Liaogeng 401 was mainly 1-3. With the number of fungi balls per ear increased, the yield decreased gradually by 2.71%-35.47%, and the chalky grain rate gradually increased by 7.02%-94.90%, the whole rice rate gradually decreased by 0.81%-13.18%. Based on the data of rice yield and quality, the numbers of 3, 6, and 9 fungus balls on a single ear is the demarcation point that affects Liaogeng 401. The occurrence of fungal balls in the upper part of the ear had a greater impact on the yield and quality than that of the fungal balls in the middle and lower parts of the ear. The occurrence of 3 fungal balls in the upper part of the ear can cause 18.56% yield loss of Liaogeng 401.