Studies on effect of climatic parameters on monthly lactation milk yields in Deoni cattle of Maharashtra, India

Author(s):  
B. N. Thorat ◽  
B. M. Thombre ◽  
S. G. Narwade

Improvement in production performance of indigenous cattle breeds becomes essential to make them economically viable. Due to increased environmental temperature cattle undergo heat stress. Milk production is adversely affected due to heat stress. In the present study records maintained at Cattle Cross Breeding Project, Vasantrao Naik Marathawada Krishi Vidyapeeth, Parbhani (Maharashtra) for the period of 1995-2010 were utilized to study monthly lactation milk yields and climatic factors. The climatic parameters considered were temperature, relative humidity, wind velocity, sunshine hours and dry and wet bulb temperature along with THI. The data on monthly lactation milk yields of cows calved during cold, hot, south-west monsoon and post monsoon seasons were considered. Correlation and multiple regression analysis were used to investigate various sources of variation in monthly lactation milk yields. Monthly lactation milk yield data were analyzed to ascertain the effect of climatic attributes and to know their association with monthly lactation milk yields. The higher milk production during post monsoon was attributed to cows calved during that season whose milk production was favoured by post monsoon climate. Seasonal climate may be the responsible factor to influence the milk production levels. The average monthly milk production (359.18+25.85 liter) was more during post monsoon season followed by cold (326.81+20.48 liter), south-west monsoon seasons (326.60 +20.45 liter) and hot (245.78+19.13 liter), respectively.

Author(s):  
B. N. Thorat ◽  
B. M. Thombre ◽  
A. T. Shinde

In the present study pedigree records maintained at Cattle Cross Breeding Project, VNMKV, Parbhani (Maharashtra) for the period of 1995-2010 were utilized to study correlation of lactation length and climatic factors. The climatic parameters considered were temperature, relative humidity, wind velocity, sunshine hours and dry and wet bulb temperature along with THI. The data on monthly lactation length of cows calved during cold, hot, south-west monsoon and post monsoon seasons were considered. Correlation and multiple regression analysis was used to investigate various sources of variation in monthly lactation length. Monthly lactation length data were analyzed to ascertain the effect of climatic attributes and to know their association with lactation lengths. The average monthly lactation length was recorded as 220.21 + 6.75 days in Deoni cattle. It can be inferred that maximum lactation length was recorded during post monsoon season (240.94 + 11.26 days) followed by south-west monsoon season (222.28 + 9.00 days), cold season (218.67 + 8.25 days) and hot season (198.95 + 10.71 days), respectively..


Author(s):  
B. N. Thorat ◽  
B. M. Thombre ◽  
D. V. Bainwad ◽  
S. S. Bhutkar

In the present investigation the sixteen years data (1995-2010) on daily peak milk yield of cows calved during cold, hot, south-west monsoon and post monsoon season each for twelve month in year and climatic attributes like temperature (maximum and minimum), humidity (maximum and minimum), sunshine hours and temperature humidity Index during corresponding period were collected. Daily peak milk yield data were analyzed statistically to see the effect of climatic attributes and to know their association with peak milk yield. Generally post monsoon climatic condition favours the milk production in animals due to pleasant climate and availability of quality fodder. The average daily peak milk yield of Deoni cows was 2.60 kg. It could be inferred that apart from availability of quality nutritious fodder during different seasons, maximum peak milk yield was recorded during post monsoon season followed by south-west monsoon season, cold season and hot season respectively.


Author(s):  
Sumera Farooq ◽  
Nazia Arshad

Sediment characteristics plays important role in the determination and functioning of coastal ecosystems. The present study is an attempt to evaluate the variability in sediment characteristics of the three beaches: Clifton, Sandspit and Buleji, at the Karachi coast. The samples were collected during pre-monsoon and south-west monsoon seasons to evaluate the seasonal differences. The sediments of the three sites showed variations in moisture content, organic matter and grain size. The highest mean moisture (27.17%) and organic contents (3.5 %) were recorded from the sediments of Clifton. The maximum fraction of sediments (> 80 %) consist of fine to very fine sand at all studied sites. The sediments of Clifton were high in very fine sand fraction and low in coarse sand fraction as compared to Sandspit and Buleji. The sediments of all the three studied sites are moderately sorted, negatively coarse-skewed and showed leptokurtic distribution. The studied beaches of Clifton, Sandspit and Buleji shows dissimilarity in sediment characteristics as indicated through Cluster and PCA analysis. The monsoonal influence on sediment characteristics was also observed at all the three studied beaches. The strong wave action during SW monsoon season results in the deposition of the coarser sediments at the high tide level thus increasing the steepness of the beaches.


MAUSAM ◽  
2021 ◽  
Vol 62 (2) ◽  
pp. 179-196
Author(s):  
D.S. PAI ◽  
O.P. SREEJITH ◽  
S.G. NARGUND ◽  
MADHURI MUSALE ◽  
AJIT TYAGI

At present, India Meteorological Department (IMD) issues various monthly and seasonal operational forecasts for the south-west monsoon season using models based on latest statistical techniques with useful skill. Operational models are reviewed regularly and improved through in house research activities. For the forecasting of the south-west monsoon season (June – September) rainfall over the country as a whole, a newly introduced statistical ensemble forecasting system is used. In addition, models have been developed for the forecast of the monsoon season rainfall over four geographical regions (NW India, NE India, Central India and South Peninsula) of the country and forecast for the rainfall over the second half of the monsoon season over the country as a whole. Models have also been developed for issuing operational forecast for the monthly rainfall for the months of July, August & September over the country as a whole. Operational forecasts issued by IMD for 2010 south-west monsoon rainfall have been discussed and verified. In addition, the experimental forecasts for the season rainfall over the country as a whole based on bothstatistical and dynamical models received from various climate research institutes within the country other than IMD arealso discussed. The operational monthly and seasonal long range forecasts issued for the 2010 southwest monsoon season for the country as a whole were accurate. However, forecasts for the season rainfall over the 4 geographical regions (Northwest India, Central India, Northeast India and south Peninsular India) were not accurate as the forecast for South Peninsular India overestimated the actual rainfall and that for northeast India underestimated the actual rainfall. The experimental forecasts for the season rainfall over the country as whole from various climate research institutes within the country showed large variance (91 % - 112% of LPA).


2012 ◽  
Vol 9 (5) ◽  
pp. 3021-3047
Author(s):  
J. Glejin ◽  
V. Sanil Kumar ◽  
T. N. Balakrishnan Nair ◽  
J. Singh

Abstract. Wave data collected off Ratnagiri, west coast of India during 1 May 2010 to 30 April 2012 is used in the study. Seasonal and annual variation in wave data controlled by the local wind system such as sea breeze and land breeze, and remote wind generated long period waves observed along the west coast of India, is studied. Sea breeze plays an important role in determining the sea state during pre and post monsoon seasons and the maximum wave height is observed during peak hours of sea breeze at 15:00 UTC. Long period waves (peak period over 13 s) are observed mainly during the pre and the post monsoon season. Maximum peak period observed during the study is 22 s and is in the month of October. Long period waves observed during the south west monsoon period of 2011 are identified as swell propagated from the Southern Ocean with an estimated travelling time of 5–6 days. The swells reaching the Arabian Sea from the South Indian Ocean and Southern Ocean, due to storms during the pre and post monsoon periods will modify the near surface winds, due to the dominant wave induced wind regime. Energy spectrum of observed waves indicates onset and decline of strong south west monsoon winds. Convergence of energy-containing frequency bands corresponding to short period waves (Tp < 8 s) and long period waves (Tp > 13 s) to intermediate period waves (8 < Tp < 13 s) are observed at the end of the pre monsoon season; divergence is observed during the start of the post monsoon period from intermediate period waves to short period waves and long period waves. South west monsoon period is characterized by the energy corresponding to the frequency band of intermediate period waves along the west coast of India.


MAUSAM ◽  
2021 ◽  
Vol 62 (2) ◽  
pp. 253-256
Author(s):  
E. KULANDAIVELU ◽  
M. SOUNDARARAJ ◽  
M.V. GUHAN

Author(s):  
Chandran Deepak ◽  
P. M. Rojan ◽  
R. Venkatachalapathy Thirupathy ◽  
A. S. Lejaniya

A study was undertaken to find out the morbidity and mortality pattern in the goat population of Kerala. Factors such as cause, age, sex, breed, season and year were included in the study. Data were collected from 3925 goats maintained at The Goat and Sheep Farm, KVASU, Mannuthy for six years from 2011 to 2017 to assess the effect of different factors. Data pertaining to 2649 goats from 2013 to 2017 were analysed to find out the morbidity pattern among goats. The overall mortality rate was 11.76 per cent. Among the various causes of mortality, the results of this study indicated that mortality due to enteritis was the highest (40.60 %) followed by that due to pneumonia (22.88%) and acidosis (10.40%). The effect of age, season, sex and year on goat mortality were significant (p<0.05). Mortality was the highest in the age group of 0.-3 months followed by 3-6 months. The incidence of mortality rates were 4.67, 5.09 5.27 and 5.26 per cent in pre-monsoon, south-west monsoon, post-monsoon and winter respectively. Mortality was more in females (64.11%) than males. Mortality was highest in cross bred goats followed by Malabari and Attappady black, but not significant. The proportional morbidity due to foot rot was the highest (35.28%) followed by enteritis (16.03%) and orf (7.65%). Highest morbidity was observed during south west monsoon (45.55%) followed by post monsoon (21.98%) and pre monsoon (18.14%). The results of this study suggest that proper management during first three months of age especially during south west monsoon was critical to minimise mortality among goats.


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