Nitrogen effect on the incidence of Striga hermonthica (Del.) Benth in upland rice.
Nitrogen effect on the incidence of Striga hermonthica (Del.) Benth in upland rice.
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DOI：
10.1556/aagr.50.2002.2.4
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发表时间：
2002-01-01
期刊：
影响因子：
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通讯作者：
Imolehin, E. D.
中科院分区：
文献类型：
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作者：
Adagba, M. A.;Lagoke, S. T. O.;Imolehin, E. D.
1997年在尼日利亚北方几内亚草原生态区的Samaru进行了旱季（试验I）和雨季（试验II）田间试验，研究了施氮量对高地品种（FARO 46、FARO 11、FARO 45、FARO 48、FARO 38）对S.赫尔蒙席卡。结果表明，FARO 48是一个通常对S. hermonthica表现出抗性。FARO 11表现出耐受性，而FARO 38、FARO 46和FARO 45表现出敏感性。90和120 kg N/hm 2的施用延缓和减少了S. hermonthica在作物上出现，诱导低作物反应评分，并产生上级谷物产量。S.在30-120 kg N/ha施氮量之间观察到hermonthica侵染。高地品种与施氮量间的显著互作表明，感病品种需要较高的施氮量才能减轻硫杆菌的影响。hermonthica与抗病品种比较。
Field trials were conducted in the dry (experiment I) and wet (experiment II) seasons of 1997 at Samaru in the northern Guinea Savanna ecological zone of Nigeria to study the effects of nitrogen rates on the reaction of upland rice (Oryza sativa) cultivars (FARO 46, FARO 11, FARO 45, FARO 48, FARO 38) to S. hermonthica. The results indicate that FARO 48, a cultivar normally susceptible to S. hermonthica, exhibited resistance. FARO 11 exhibited tolerance, while FARO 38, FARO 46, and FARO 45 exhibited susceptibility. The application of 90 and 120 kg N/ha delayed and reduced S. hermonthica emergence on the crop, induced a low crop reaction score, and produced superior grain yields. No significant differences in S. hermonthica infestation were observed between nitrogen rates of 30-120 kg N/ha. The significant interaction between upland rice cultivars and nitrogen rates indicates that the susceptible cultivars require higher rates of nitrogen to ameliorate the effect of S. hermonthica compared with the resistant cultivars.