长尾刺线虫对草坪中硝酸盐淋失的影响。
Influence of Belonolaimus longicaudatus on Nitrate Leaching in Turf.
作者信息
Luc J E, Crow W T, Stimac J L, Sartain J B, Giblin-Davis R M
机构信息
Graduate Student, Associate Professor, and Professor, respectively, Entomology and Nematology Department, University of Florida, Gainesville FL 32611 Professor, Soil and Water Science Department, University of Florida, Gainesville FL 32611 Professor, University of Florida-IFAS, Fort Lauderdale Research and Education Center, 3205 College Ave., Davie, FL 33314.
出版信息
J Nematol. 2006 Dec;38(4):461-5.
Experiments were conducted to quantify the effects of the sting nematode (Belonolaimus longicaudatus) on root reductions and quantity of nitrate (NO(3) (-)) leached from 'Tifdwarf' bermudagrass in lysimeters. Forty lysimeters were planted with 'Tifdwarf' bermudagrass, of which 20 were inoculated with B. longicaudatus and 20 were noninoculated. Root length was compared between treatments at six, 12, and 18 weeks after initiation of the experiments. Turf was fertilized every three weeks, and leaching events were simulated at 21 and 42-day intervals in trial one and trial two, respectively. Leachate was collected, and the quantity of NO(3) (-) leached was compared between treatments. Root reductions were observed in lysimeters inoculated with B. longicaudatus at all evaluation dates. Quantity of NO(3) (-) leached was greater in inoculated lysimeters at the 18-week evaluation during both trials. This study indicates that nematode damage to turf roots limits root vigor and N uptake, thereby increasing nitrate leaching, adding to water quality concerns.
开展了实验，以量化刺线虫（长针线虫）对渗滤计中‘矮生百慕大’狗牙根根系减少量以及硝酸盐（NO(3) (-)）淋溶量的影响。四十个渗滤计种植了‘矮生百慕大’狗牙根，其中20个接种了长针线虫，20个未接种。在实验开始后的六周、十二周和十八周，比较了各处理间的根长。每三周对草皮施肥一次，在试验一中分别以21天和42天的间隔模拟淋溶事件，在试验二中分别以21天和42天的间隔模拟淋溶事件。收集渗滤液，比较各处理间NO(3) (-)的淋溶量。在所有评估日期，接种长针线虫的渗滤计中均观察到根系减少。在两项试验的18周评估时，接种线虫的渗滤计中NO(3) (-)的淋溶量更大。本研究表明，线虫对草皮根系的损害限制了根系活力和氮素吸收，从而增加了硝酸盐淋溶，加剧了对水质的担忧。
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