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Mohammad Shaheed Hossain Chowdhury Shampa Biswas Md. Abdul Halim S. M. Sirajul Haque Nur Muhammed Masao Koike 《林业研究》2007,18(1):27-30
Status of organic carbon （C）, total nitrogen （N）, available potassium （K）, calcium （Ca） and phosphorus （P） in three different depths （0-5 cm, 5-15 cm and 15-30 cm） on two hill slopes of 35% and 55% in orange orchard cultivated by the Mro tribe of Chittagong Hill. Tracts （CHTs） were evaluated and compared with those in degraded bush forests, through digging three profiles in each land use. The content of all the five nutrients was found to be higher in the soil of orange orchard than in the soil of forest. But the variation was not consistent for both the slopes. The content varied depth wise also, having the highest value in surface soil in case of both the land uses on both the slopes. A mean available K content was significantly higher in orange orchard than in forest on 55% slope, while it was lower on 35% slope. Surface soil contained the nutrients of K and Ca with the amount of 0.2905-mg·g^-1 soil and 3.025-mg·g^-1 soil respectively in the orchard, while 0.1934-mg·g^-1 soil and 1.6083-mg·g^-1 soil were respectively in the forest. Organic carbon and total nitrogen were found more or less similar in surface soil on both the land uses showing a slight difference. Available P was found only in orange orchard, and in forest it was too little in amount to detect by the spectrophotometer. The degraded forests were poor in nutrient content due to high rate of soil erosion, which would be possible to be improved by bringing it under tree cover as proved by the adaptation of orange orchard there. 相似文献
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Summary This study was conducted to determine the crop water stress index (CWSI) for potato (Solanum tuberosum L.) grown under furrow and drip irrigation methods and subjected to three different irrigation levels (100, 50 and 0% replenishment
of soil water depleted). The lower (non-stressed) and upper (stressed) baselines were determined empirically from measurements
of canopy temperatures, ambient air temperatures and vapor pressure deficit values. Tuber yield decreased when mean CWSI prior
to irrigation exceeded 0.68 in furrow and 0.81 in drip irrigation. The tuber yield was directly correlated with the seasonal
CWSI values and the linear equations for furrow and drip irrigation methods, Y = −45.82 CWSI + 50.69 and Y = −52.65 CWSI +
58.44, respectively, can be used for yield prediction. 相似文献
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A H Halim C E Wassom H L Mitchell L K Edmunds 《Journal of agricultural and food chemistry》1973,21(6):1118-1119
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Mohammad Shaheed Hossain Chowdhury Md. Abdul Halim Shampa Biswas S. M. Sirajul Haque Nur Muhammed Masao Koike Assistant Commissioner Magistrate Office of the Deputy Commissioner Jamalpur- Bangladesh M. Sc. student in Mountain Forestry University of Natural Resources Applied Life Sciences-BOKU Vienna Austria Professor 《林业研究》2007,(3)
对孟加拉国丘陵地带Mro部落经营的桔园与灌木林35%和55%两种坡地土壤物理性质进行了比较与评价。每一块用地内挖掘3个土壤剖面采集不同深度(0-5cm,5-15cm and 15-30cm)的土壤样品,测定土壤水分、有机质含量和土壤密度。最大持水量、田间持水量、干或湿土壤容重和土壤孔隙度的测定仅限于表层土壤。两种坡地桔园3个深度的土壤水分含量均显著高于灌木林地相同深度的土壤水分。桔园在55%坡地内土壤有机质含量低于林地含量值,而在35%坡地内的含量值则高于林地值。两块样地内上述两项测定值均在表层土壤中最高,且随土层深度的增加而降低。与灌木林地比较,桔园地表层土壤最大持水量、孔隙度和3个不同深度的土壤密度均较低。两块用地内不同坡地的表层土田间持水量有所差异,且桔园地干或湿表层土壤容重高于林地内的数值。表5参23。 相似文献
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孟加拉国丘陵地带桔园和灌木林地土壤物理性质的比较评价 总被引：1，自引：1，他引：0
Mohammad Shaheed Hossain Chowdhury Md. Abdul Halim Shampa Biswas S. M. Sirajul Haque Nur Muhammed Masao Koike 《林业研究》2007,18(3):245-248
The physical properties of soil on two hill slopes of 35% and 55% in orange orchard cultivated by the Mro tribe of Chittagong Hill Tracts （CHTs） were evaluated and compared with those of bushy hill forests. Soil samples were collected from three different depths （0-5 cm, 5-15 cm and 15-30 cm）, digging three profiles in each land use for determining moisture content, organic matter content and particle density. Maximum water holding capacity, field capacity, dry and moist bulk density and porosity were determined only for the surface soils. Moisture content at all the soil depths was significantly higher （p≤ 0.05） in orange orchard than in forest on both the slopes. Orange orchard contained lower mean soil organic matter than forest on 55% slope, while it contained higher values on 35% slope compared to forest. The highest value of the above two properties was found at surface soil in both the land uses on both the slopes, decreasing with the increase of soil depth. On both the slopes maximum water holding capacity and porosity of surface soil and particle density at all soil depths were lower in orange orchard compared to those in forest. Field capacity values of surface soil did not show consistency in trend for the differences between the two land uses on both the slopes. Bulk density value of moist and dry surface soil was higher in orange orchard than in forest on both the hill slopes. 相似文献
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Nakatsuji S Kuga K Kimura K Satake R Katayama N Nishibori E Sawa H Ishii R Hagiwara M Bridges F Ito TU Higemoto W Karaki Y Halim M Nugroho AA Rodriguez-Rivera JA Green MA Broholm C 《Science (New York, N.Y.)》2012,336(6081):559-563
Frustrated magnetic materials, in which local conditions for energy minimization are incompatible because of the lattice structure, can remain disordered to the lowest temperatures. Such is the case for Ba(3)CuSb(2)O(9), which is magnetically anisotropic at the atomic scale but curiously isotropic on mesoscopic length and time scales. We find that the frustration of Wannier's Ising model on the triangular lattice is imprinted in a nanostructured honeycomb lattice of Cu(2+) ions that resists a coherent static Jahn-Teller distortion. The resulting two-dimensional random-bond spin-1/2 system on the honeycomb lattice has a broad spectrum of spin-dimer-like excitations and low-energy spin degrees of freedom that retain overall hexagonal symmetry. 相似文献
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Halimatun H. Abdul‐Halim Mohammed Aliyu‐Paiko Roshada Hashim 《Journal of the World Aquaculture Society》2014,45(2):233-241
A 12‐wk feeding trial was carried out to examine the response of snakehead, Channa striata, fingerlings to diets containing poultry by‐product meal (PBM) protein as replacement to fish meal (FM) protein. Fish (mean initial weight 3.98 ± 0.01) were reared in 15 tanks and fed one of five isocaloric (18.5 kJ/g gross energy) diets, in triplicates. Each diet was formulated to contain 45% crude protein and 6.5% crude fat and utilizing protein from PBM to replace that of defatted FM in the following decreasing order; 40, 30, 20, 10, and 0%, respectively. Fish were fed assigned diets to apparent satiation twice daily during the trial, for 12 wk. Water quality parameters (temperature, pH, and dissolved oxygen) were monitored and ranged between 28.5–30.5 C, 6.1–6.6, and 4.61–6.34 mg/L, respectively. Fish survival and growth performance were not significantly (P < 0.05) different among all the treatments. Dietary PBM level did not significantly (P > 0.05) affect the hepatosomatic (HSI) and viserosomatic indices (VSI) in fish and the carcass protein and ash compositions. Muscle lipid was significantly the highest in the 30PBM compared to 0PBM, 10PBM and 20PBM groups, but similar to the 40PBM treatment. The result of this trial indicates that protein from PBM could be used to successfully replace minimum 40% of defatted FM protein in diets for snakehead fingerlings without negative effects on growth and feed utilization. 相似文献