植物保护剂施用时期及次数对再生稻病害防控及增产的影响OA
Effects of application period and frequency of a plant protection formulation treatment on disease prevention and yield increase of ratoon rice
为探究植物保护剂[42%肟菌·戊唑醇悬浮剂(SC)、12.5%氟环唑SC、抗逆助剂、增产助剂]对再生稻病害防控及产量的影响,明确最佳施用时期和次数,以再生稻晶两优8612为试验材料,设置5个处理,分别为T1(苗期+分蘖盛末期+破口前)、T2(分蘖盛末期+破口前)、T3(分蘖盛末期+破口前+齐穗期)、T4(分蘖盛末期+破口前+再生季破口前)、T5(破口前+齐穗期+再生季破口前),以及市售药剂对照T6[分蘖盛末期(300 g/L苯甲·丙环唑乳油)+破口前(325 g/L 苯甲·嘧菌酯SC)]和空白对照(CK),调查各处理下水稻的纹枯病防效、农艺性状和产量.结果表明,纹枯病防效方面,T1～T4处理对纹枯病的防治效果均较佳,病株率在3.28%～16.64%,防效在90.18%～98.18%;农艺性状方面,T1处理的头季稻茎秆最粗(6.50 mm),T3处理的头季稻有效穗数(361.8个/m2)和再生季发新率最高(1.48%),T4处理的再生季有效穗数量最高(377.2个/m2);产量方面,T1处理的头季稻产量最高(9.20 t/hm2),T4处理的再生季水稻产量(4.36 t/hm2)和总产量(13.33 t/hm2)均最高.综合表明,施用植物保护剂能明显提高再生稻的抗病能力和产量,本试验条件下T4处理的促进效果最佳.本文为再生稻生产中植物保护剂的应用提供参考.
To explore the effects of plant protectants[42%trifloxystrobin·tebuconazole suspension concentrate(SC),12.5%epoxiconazole SC,stress-resistant additives and yield-increasing additives]on disease prevention and yield improvement of ratoon rice,and clarify the optimal application period and frequency,ratoon rice variety Jingliangyou 8612 was selected as the test material.Five treatments were set in this experiment:T1(seedling stage+late tillering stage+pre-booting stage),T2(late tillering stage+pre-booting stage),T3(late tillering stage+pre-booting stage+full heading stage),T4(late tillering stage+pre-booting stage+ratoon season pre-booting stage),and T5(pre-booting stage+full heading stage+ratoon season pre-booting stage).Meanwhile,the commercially available pesticide control T6(sprayed with 300 g/L difenoconazole·propiconazole EC at late tillering stage and 325 g/L difenoconazole·azoxystrobin SC at pre-booting stage)and blank control(CK)were established.The control efficiency against rice sheath blight,agronomic traits and yield in each treatment were investigated.The results showed that T1-T4 presented excellent control effects on sheath blight,with the diseased plant rate ranging from 3.28%to 16.4%and the control efficiency ranging from 90.18%to 98.18%.In terms of agronomic traits,T1 had the thickest stem diameter(6.50 mm)of main crop rice;T3 obtained the highest effective panicle number(361.8 plants/m²)of main crop rice and the highest ratooning rate(1.48%);T4 had the maximum effective panicle number(377.2 plants/m²)in the ratoon season.In terms of yield,the T1 treatment achieved the highest grain yield of the main crop rice at 9.20 t/hm²,while the T4 treatment had the highest yield of ratoon rice(4.36 t/hm²)and the maximum total yield(13.33 t/hm²).Comprehensive analysis indicated that the application of plant protectants could significantly enhance disease resistance and grain yield of ratoon rice.Under the experimental conditions,treatment T4 exhibited the best comprehensive regulation effect.This study provides a theoretical and practical reference for the rational application of plant protectants in ratoon rice production.
王帅;张赛峰;曹明章;李广泽;王京;施高强;李超
深圳诺普信作物科学股份有限公司,广东 深圳 518102深圳诺普信作物科学股份有限公司,广东 深圳 518102深圳诺普信作物科学股份有限公司,广东 深圳 518102深圳诺普信作物科学股份有限公司,广东 深圳 518102深圳诺普信作物科学股份有限公司,广东 深圳 518102深圳诺普信作物科学股份有限公司,广东 深圳 518102深圳诺普信作物科学股份有限公司,广东 深圳 518102
农业科技
再生稻植物保护剂纹枯病农艺性状产量
ratoon riceplant protection formulationsheath blightagronomic traitsyield
《安徽农学通报》 2026 (9)
7-11,5
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