全文获取类型
收费全文 | 123篇 |
免费 | 2篇 |
专业分类
林业 | 4篇 |
农学 | 7篇 |
36篇 | |
综合类 | 17篇 |
农作物 | 13篇 |
水产渔业 | 10篇 |
畜牧兽医 | 25篇 |
园艺 | 6篇 |
植物保护 | 7篇 |
出版年
2021年 | 1篇 |
2020年 | 4篇 |
2019年 | 2篇 |
2018年 | 7篇 |
2017年 | 1篇 |
2016年 | 5篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 13篇 |
2012年 | 3篇 |
2011年 | 5篇 |
2010年 | 4篇 |
2009年 | 3篇 |
2008年 | 6篇 |
2007年 | 3篇 |
2006年 | 8篇 |
2005年 | 2篇 |
2004年 | 3篇 |
2003年 | 5篇 |
2002年 | 3篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1985年 | 3篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1973年 | 2篇 |
1971年 | 1篇 |
1969年 | 3篇 |
1967年 | 1篇 |
1966年 | 1篇 |
1965年 | 1篇 |
1964年 | 1篇 |
排序方式: 共有125条查询结果,搜索用时 0 毫秒
101.
Summary Four barley strains viz. 1098–2, 1098–7, 1098–9 and 733–6, obtainedfrom the progeny of the crosses, Jyoti x Hyproly and Vijay x Hiproly which showed an increase in the grain protein content and an improvement in amino acid balance, were identified. 相似文献
102.
Prince L. Leslie Leo Rajaravindra K. S. Rajkumar U. Reddy B. L. N. Paswan C. Haunshi S. Chatterjee R. N. 《Tropical animal health and production》2020,52(6):3153-3163
Tropical Animal Health and Production - Variance and genetic parameters were estimated for growth and production traits of synthetic broiler female line (PB-2) using REML animal model to delineate... 相似文献
103.
An experiment was conducted to study regrowth and yield of coriander influenced by nitrogen (N) with five different urea doses (0, 1.5, 2.0, 2.5, 3.0% by volume) as foliar spray. Spraying of urea has a significant impact on growth and yield in the second cut. Leaf emergence rate (LER) was higher during initial growth phase and then drastically reduced until first cutting, whereas the stem elongation rate (SER) recorded its peak value during 75-105 DAS. Impact of foliar spray was conspicuous during the later phase of regrowth with the treatment of 2.5% urea achieving the highest SER. Additional return due to spraying was positive up to a dose of 2.5% urea and decreased thereafter. Hence, the study indicated that a foliar spray of nitrogen (2.5% urea) may be beneficial for coriander leaf production under multicut system and the crop is sensitive to rainfall, phototemperature, and morning humidity. 相似文献
104.
ABSTRACT To observe the effects of deficiency and excess of copper (Cu) on rapeseed (Brassica napus L. cv ‘T44’), plants were raised in refined sand at variable levels of Cu (as copper sulfate): 0.01, 0.1, 0.5, 1, 10, 100, and 200 μM, representing a range from acute deficiency to excess. In rapeseed, excess Cu (200 μM) induced chlorosis on young leaves similar to iron (Fe) deficiency symptoms and appeared earlier (day 30) than symtoms of Cu deficiency (day 40). Foliar symptoms of Cu deficiency (0.01 μM) were initiated on young leaves as interveinal chlorosis, later leading to necrosis. The margins of the affected leaves curled inward and leaves hung down due to loss of turgor. The deficiency (< 1 μM Cu) and excess (100 and 200 μM Cu) of Cu lowered the biomass, pod, and seed yield, concentration of chlorophylls (a and b), Hill reaction activity, activity of catalase and polyphenol oxidase, and increased the activity of ribonuclease and acid phosphatase in leaves. The activity of peroxidase decreased and the concentration of copper in leaves (young and old) and seeds increased with an increase in Cu from low to excess. The accumulation of Cu was greater in old than in young leaves. The seed quality of rapeseed was poor both in deficiency (< 1 μM) and excess (> 1 μM) of Cu, which was reflected in reduction in size and number of pods and seeds, oil content, concentration of protein, carbohydrate fractions (sugars and starch), protein nitrogen (N), and methionine, and increased concentration of phenols and non-protein N in seeds. The values of Cu deficiency, threshold of deficiency, threshold of toxicity, and toxicity were, respectively, 3.8, 6.6, 32, and 54 μg Cu g?1 dry matter in young leaves and 2.2, 5.8, 20, and 28 μg Cu g?1 dry weight in seeds of rapeseed. 相似文献
105.
Gitanjali Bhakuni B. K. Dube Pratima Sinha C. Chatterjee 《Journal of plant nutrition》2013,36(4):703-711
To observe the effects of copper (Cu) deficiency on growth, metabolism, and reproductive yield of chickpea (Cicer arietinum L.) cv. ‘13.G-256’, plants were grown in refined sand at deficient (0.1 μM) and adequate Cu (1 μM), supplied as copper sulfate (CuSO4·5H2O). At d 35–40, at deficient Cu, the growth of plants were depressed and the young leaflets appeared reduced in size, chlorotic, with narrow pointed tips. The primary branches collapsed later, and secondary branches were stunted with reduced number of leaves. The flowering was disturbed, less flowers matured, as a consequence pods and seeds were reduced, malformed and low in productivity, which lowered biomass and economic yield and is accompanied by decrease in Cu concentration in leaves and seeds. The quality of seeds deteriorated at deficient Cu as the concentration of proteins, carbohydrates (sugars and starch), protein nitrogen were lowered, and phenols, non-protein nitrogen, increased. Whereas in leaves, the concentration of carbohydrates (sugars and starch), phenols, and non-protein nitrogen were elevated and protein nitrogen was reduced. Copper deficiency also alleviated the concentration of chlorophyll (a and b) in leaves. At deficient Cu, the activity of antioxidative enzyme viz. peroxidase along with that of acid phosphatase and ribonuclease increased in leaves, seeds and pod wall of chickpea. 相似文献
106.
Haunshi S Panda AK Rajkumar U Padhi MK Niranjan M Chatterjee RN 《Tropical animal health and production》2012,44(7):1653-1658
A study was conducted to evaluate the effect of feeding different metabolizable energy (ME) and crude protein (CP) levels on performance of Aseel chicken during 0 to 8?weeks of age (Juvenile phase). At 1?day old, 432 chicks were randomly distributed into nine groups. Each group had 48 chicks distributed into eight replicates with six birds in each. Maize-soybean meal-based diets with three ME levels (2,400, 2,600 and 2,800?kcal/kg) and three CP levels (16%, 18% and 20%) were fed to birds in a 3?×?3 factorial design. Different ME levels had significant effect on body weight gain (BWG), feed intake and feed conversion ratio (FCR). Birds fed diet with 2,400?kcal/kg ME had significantly lower BWG (P?0.004), lower shank length (P?0.0007), higher feed intake (P?0.0001) and poor FCR (P?0.0001) than those fed diet with either 2,600 or 2,800?kcal/kg ME. Energy efficiency ratio was not influenced by ME, CP or their interaction. However, protein efficiency ratio was significantly higher at higher ME levels and lower at higher CP levels. There was significant effect of ME, CP and their interaction on serum protein and cholesterol levels. However, they made no significant effect on antibody titre against New Castle disease vaccine. The study concluded that provision of 2,600?kcal/kg ME and 16% CP would be ideal for optimum growth of Aseel birds during juvenile phase. However, to obtain better FCR, feeding Aseel birds with diet having 2,800?kcal/kg ME and 16% CP would be ideal. 相似文献
107.
Differential expression of Toll-like receptor mRNA in White Leghorn and indigenous chicken of India 总被引:1,自引:0,他引:1
Kannaki T. Ramasamy Maddula R. Reddy Dhanutha N. Raveendranathan Shanmugam Murugesan Rudra N. Chatterjee Rajkumar Ullengala Santosh Haunshi 《Veterinary research communications》2010,34(7):633-639
In the present experiment, the expression profile of Toll-like receptor mRNA in indigenous and pure line chickens was studied.
The expression of TLR3, TLR4, TLR5 and TLR7 were quantified in heterophils of Aseel, Kadaknath, Naked neck, Dwarf and White
Leghorn lines by Quantitative Real-time PCR. White Leghorns expressed significantly (P < 0.01) higher levels of TLR3 mRNA
compared to other lines. TLR4 and TLR5 mRNA were significantly highly expressed in Kadaknath line. Among the TLRs investigated
TLR5 was more expressed in all lines studied. TLR7 was highly expressed in indigenous chicken Aseel and Kadaknath than other
lines. Dwarf chicken expressed significantly (P < 0.01) lower levels of all TLRs investigated. On the basis of the present
study we conclude that the differential expression of TLR mRNA in the heterophils of indigenous and other chicken breeds might
contribute to their variable disease resistance/susceptibility. 相似文献
108.
1. The effects of vitamin E (DL-alpha-tocopheryl acetate) and vitamin C (ascorbic acid) supplementation on performance, some immune variables and antioxidant status of White Leghorn layers (aged 44-56 weeks) exposed to tropical summer conditions were investigated. 2. Both vitamins E and C significantly improved the egg production, food conversion efficiency, antibody responses to inoculated sheep red blood cells (SRBC) and Newcastle disease virus (NDV) vaccine, lymphocyte proliferation in response to mitogen and activities of antioxidant enzymes red blood cell catalase (RBCC) and glutathione peroxidase (GSH-PX) in layers. Vitamin C increased the inflammatory response to phytohaemagglutinin-P (PHA-P) inoculation. 3. Supplemental vitamin C at 200 mg/kg diet significantly increased eggshell weight, eggshell thickness, and shell breaking strength. However, no effect of supplemental vitamin E on eggshell quality was observed. 4. Vitamins E and C, as well as interactions between them, significantly influenced the activities of glutathione reductase and lipid peroxidase. A combination of vitamin E at 125 IU/kg with vitamin C at 200 mg/kg diet had an additive effect on reducing the activity of oxidative enzyme lipid peroxidase (LP) and increasing the activity of antioxidant enzyme glutathione reductase (GSHR). 5. It is concluded that vitamin E (125 IU/kg) and vitamin C (200 mg/kg) could independently alleviate the effects of heat stress on production performance and immunological variables of layers. However, combination of both the vitamins at the above-mentioned concentrations is beneficial in eliciting higher antioxidant status in laying hens exposed to tropical summer conditions. 相似文献
109.
Amitava Chatterjee Jasper Teboh Spencer Nelson Ezra Aberle Blain G. Schatz Szilvia Zilahi-Sebess 《Communications in Soil Science and Plant Analysis》2017,48(7):730-740
No-tillage and manure application effect on soil organic carbon (SOC) and total nitrogen (N) concentrations were studied under a 27-year-old 4-year rotation consisting corn (Zea mays L.)-soybean (Glycine max L.)-wheat (Triticum aestivum L.)-field pea (Pisum sativum L.). Under each crop, four applied N treatments were control, annual urea-N applications at the rate of 45 and 89 kg N ha?1, and composted beef cattle feedlot manure-N at the rate 179 kg N ha?1 applied once every four year. For each fertilizer treatment, no-till (NT) and conventional till (CT) were compared for basic soil properties, SOC, and total N within 0–15 cm soil. Manure application significantly reduced soil bulk density and increased SOC and total N over urea-N. Particulate organic matter, mineralizable N, and permanganate-oxidizable C fractions significantly related with SOC. Long-term manure additions and no-tillage had potential to improve soil compaction and maintain SOC over chemical fertilizer N and CT. 相似文献
110.