| dc.contributor.advisor | Prof. Dr. Shah Moinur Rahman | |
| dc.contributor.author | Akhi, Sawon priya | |
| dc.date.accessioned | 2022-04-13T08:41:23Z | |
| dc.date.available | 2022-04-13T08:41:23Z | |
| dc.date.issued | 2017-12 | |
| dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/78 | |
| dc.description | Rice is usually grown in low land areas under continuous flooded conditions. It
is estimated that over 75 percent of the world’s rice is produced using
continuous flooding water management practices (Van der Hoek et al., 2001).
According to Sharma (1989) the continuous flooding method is very inefficient
as about 50–80 percent of the total water input is wasted. Other disadvantages
of continuous flooding are: high emissions of methane (Wassmann et al., 2009,
FAO, 2010) greater vulnerability to water shortages than other cropping
systems (Wassmann, 2010); leaching of soluble nutrients, blocking of soil
microbial activities, and reduced mineralization and nutrient release from the
soil complexes (Uphoff and Randriamiharisoa, 2002).Water saving is the main
issue in maintaining the sustainability of rice production when water resources
are becoming scarce (Arif et al., 2012). In Asia, with relatively more suitable
growing conditions for rice, production has declined due to increasing water
stress (Aggarwal et al., 2000; Tao et al., 2004). | en_US |
| dc.description.abstract | The experiment was conducted at Hajee Mohammad Danesh Science and
Technology University, Dinajpur from December 2016 to June 2017. The
experiment consisted four water management practices viz. T1= Conventional
method (Flooding), T2= Shallow Water Depth (SWD), T3= Aerobic condition
(Unsaturated), T4= Alternate Wetting and Drying (AWD). The experiment was
laid out in Randomized Complete Block Design (RCBD) with five replications.
Different water management practices influenced significantly on most of the
parameters. Among the water management practices T1 and T4 performed best in
plant height, number of tillers, number of effective and ineffective tillers and
panicle length, days to panicle initiation, no of grain per panicle, no of filled and
unfilled grain per panicle and 1000 grains weight and lowest result was observed
from T3. Maximum grain yield was obtained from T1 (7.5 t ha-1
) and T4 (7.3 t ha-1
).
Maximum biological yield was obtained from T1 (16.7 t ha-1
) whereas minimum
grain yield (5.6 t/ha) was observed in T3. Minimum content of Cd (0.02 mg Kg-1
grain, 0.12 mg Kg-1
straw) and As (0.013 mg Kg-1 grain, 0.25 mg Kg-1
straw) was
found in T4 and maximum content of Cd (0.053 mg kg-1 grain, 0.23 mg Kg-1
straw) and As (0.036 mg Kg-1 grain, 0.53 mg Kg-1
straw) was found in T1 | en_US |
| dc.language.iso | en | en_US |
| dc.subject | Soil texture | en_US |
| dc.subject | Crop | en_US |
| dc.title | EFFECTS OF WATER MANAGEMENT PRACTICES ON ARSENIC AND CADMIUM ACCUMULATION IN RICE PLANT | en_US |
| dc.type | Thesis | en_US |
