Environmental characterization of floodwater in Eastern India: Relevance to submergence tolerance of lowland rice
Environmental characterization of floodwater in Eastern India: Relevance to submergence tolerance of lowland rice
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DOI：
10.1017/s0014479799002057
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发表时间：
1999-04-01
影响因子：
1.6
通讯作者：
Singh, RK
中科院分区：
文献类型：
--
作者：
Ram, PC;Singh, AK;Singh, RK
通过在印度东部干旱的低地和深水水稻区进行为期三年的实地调查，对洪水进行了表征。测量的重点是溶解的O-2和CO2，pH值和辐照度在稻田山洪暴发。在不同的地点和时间，溶解的O-2浓度范围从0到0.28 mol m（-3）（0-1.1倍空气饱和水在30摄氏度），而溶解的CO2范围从0.28到1.96 mol m（-3）（31-217倍空气饱和水）。洪水的pH值从6.6到9.7不等。辐照度随深度的水剖面的浊度在一定程度上取决于。湍流随地点和时间变化很大。讨论了这些测定在水稻耐淹性鉴定中的意义。
Floodwater was characterized through field surveys over three years in rainfed lowland and deepwater rice areas of Eastern India. Measurements focused on dissolved O-2 and CO2, pH and irradiance during flash floods in rice fields. Over locations and time, dissolved O-2 concentrations ranged from zero to 0.28 mol m(-3) (0-1.1 times air-saturated water at 30 degrees C) while dissolved CO2 ranged from 0.28 to 1.96 mol m(-3) (31-217 times air-saturated water). Floodwater pH varied from 6.6 to 9.7. Irradiance decreased with depth in the water profile to an extent depending on turbidity. Turbidity varied greatly over locations and time. The significance of these measurements in assessing rice submergence tolerance is discussed.