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A long-term experiment was used to evaluate the effect of integrated nutrient management on the distribution of soil organic N fractions and their contribution to N nutrition of a rice–wheat system. Continuous application of mineral fertilizers, alone or in combination with organic manures for 7 years, led to a marked increase in total N, hydrolysable N (amino acid-N, amino sugar-N, ammonia-N, hydrolysable unknown-N) and non-hydrolysable N compared with their original status in soil. However, continuous rice–wheat cropping without any fertilization resulted in depletion of total N, hydrolysable N and non-hydrolysable N by 21.3, 23.5 and 15.1% over their initial status in surface soil. The effect of press mud (PM) treatment was more pronounced in increasing total and hydrolysable N compared with farmyard manure (FYM) or green manure (GM) treatment. Incorporation of PM, FYM and GM along with mineral fertilizers increased the total N content by 32.8, 18.3 and 5.1% and that of hydrolysable N by 25.7, 19.6 and 9.5%, respectively, over mineral fertilizer treatment. Among the most important fractions, amino sugar-N, amino acid-N and ammonia-N were found to be most the important fractions contributing to grain yield and nitrogen uptake of rice and wheat crops. 相似文献
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Ghosh S Mehla RK Sirohi SK Tomar SK 《Journal of animal physiology and animal nutrition》2011,95(4):449-455
Twelve crossbred calves (Holstein cross) in their pre-ruminant stage were used to study the effect of garlic extract feeding on their performance and they were randomly allotted into treatment and control groups in equal number. Performance was evaluated by measuring average body weight (BW) gain, feed intake [dry matter (DM); total digestible nutrient (TDN) and crude protein (CP)], feed conversion efficiency (DM, TDN and CP), fecal score and fecal coliform count. Diets were same for both groups. In addition, treatment group received garlic extract supplementation at 250 mg/kg BW/day/calf. BW measured weekly, feed intake measured twice daily, proximate analysis of feeds and fodders analysed weekly, fecal scores monitored daily and fecal coliform count done weekly. There was a significant (p < 0.01) increase in mean BW gain and feed intake and a significant (p < 0.01) decrease in severity of scours as measured by fecal score in the treatment group compared to the control group. The results suggest that garlic extract can be supplemented to the calves for better performance. 相似文献
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Surendra Pratap Singh Ram Kumar Mehla Mahendra Singh 《Tropical animal health and production》2012,44(8):1827-1832
Ten dry and pregnant Murrah buffaloes were selected to investigate the effect of Asparagus racemosus feeding on hormones, metabolites, milk yield, and plasma cholesterol levels. The treatment groups of buffaloes were fed with A. racemosus (shatavari) @?150?g/day/animal during prepartum and @?300?g/day/animal during the postpartum period. Blood samples collected on ?6, ?4, ?2-week, day of parturition (0), and +2, +4, and +6-week postpartum were analyzed for plasma total cholesterol, triglycerides, HDL, low-density lipoproteins (LDL), prolactin, cortisol, and blood metabolites. Milk samples collected at weekly intervals (+1, +3, +5, and 7?weeks) were analyzed for total milk fat cholesterol. Prepartum plasma cholesterol concentrations were significantly higher in treatment group over the control (P?<?0.05). Mean plasma triglycerides, LDL cholesterol, HDL cholesterol, glucose, and nonesterified fatty acid (NEFA) levels varied nonsignificantly between groups. Plasma prolactin and cortisol concentrations were significantly (P?<?0.01) more in treatment group than in control group. On day of parturition, plasma prolactin, cortisol, LDL, and plasma total cholesterol were higher (P?<?0.01) in treatment group buffaloes in comparison to control group. A. racemosus feeding significantly (P?<?0.01) increased plasma prolactin, cortisol (P?<?0.01), and milk fat cholesterol (P?<?0.05) without affecting total cholesterol, HDL, LDL, glucose, and NEFA concentrations. The buffaloes of treatment group produced more milk (?@?0.526?kg/animal/day) suggesting thereby that A. racemosus is galactopoietic. It was concluded that feeding of A. racemosus increases plasma prolactin and cortisol and decreased plasma total cholesterol and LDL concentration. 相似文献
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Ghosh Sudipta Mehla Ram K. Sirohi S. K. Roy Biswajit 《Tropical animal health and production》2010,42(5):961-968
Thirty-six crossbred calves (Holstein cross) of 5 days of age were used to study the effect of garlic extract feeding on their
performance up to the age of 2 months (pre-ruminant stage). They were randomly allotted into treatment and control groups
(18 numbers in each group). Performance was evaluated by measuring average body weight (BW) gain, feed intake (dry matter
(DM), total digestible nutrient (TDN) and crude protein (CP)), feed conversion efficiency (FCE; DM, TDN and CP), faecal score,
faecal coliform count and feeding cost. Diets were the same for the both groups. In addition, treatment group received garlic
extract supplementation at 250 mg/kg BW per day per calf. Body weight measured weekly, feed intake measured twice daily, proximate
analysis of feeds and fodders analysed weekly, faecal scores monitored daily and faecal coliform count done weekly. There
was significant increase in average body weight gain, feed intake and FCE and significant decrease in severity of scours as
measured by faecal score and faecal coliform count in the treatment group compared to the control group (P < 0.01). Feed cost per kilogramme BW gain was significantly lower in the treatment group compared to control group (P < 0.01). The results suggest that garlic extract can be supplemented to the calves for better performance. 相似文献
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Thirty-six Holstein cross calves 5 days of age in their preruminant stage were used to study the effect of feeding prebiotic
(mannanoligosaccharide) on their performance up to the age of 2 months. Treatment and control groups consisted of 18 calves
each. Treatment group was supplemented with 4 g prebiotic (mannanoligosaccharide)/calf/day. Performance was evaluated by measuring
average body weight (BW) gain, feed intake [dry matter (DM), total digestible nutrient (TDN) and crude protein(CP)], feed
conversion efficiency (DM, TDN, and CP), fecal score, fecal coliform count and feeding cost. Body weight measured weekly,
feed intake measured twice daily, proximate analysis of feeds and fodders analyzed weekly, fecal score monitored daily and
fecal coliform count done weekly. There was a significant increase in average body weight gain, feed intake and feed conversion
efficiency; and a significant decrease in severity of scours as measured by fecal score and fecal coliform count in the treatment
group compared with control group (P < 0.01). Feed cost/kg BW gain was significantly lower in the treatment group compared to control group (P < 0.01). The results suggest that prebiotic (mannanoligosaccharide) can be supplemented to the calves for better performance. 相似文献
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