RESPONSE OF RICE VARIETIES GROWN ON CALCAREOUS AND ACID MIXED SOILS AMENDED BY VERMICOMPOST UNDER VARIABLE CLIMATES

A field experiment was conducted to explore how rice (BINA Dhan 11 and BRRI Dhan 34) responds in modified soil and climatic conditions. They were planted on artificially prepared soil beds by mixing calcareous and acid soils in 1:1 and 1:3 ratios. Soil temperature (St) was elevated up to 20C over the diurnal ones. Moisture (M) was maintained at 50%, 70%, and saturated (100%) soil conditions. Vermicompost (V) was applied at the rates of 0, 10, and 15 tha-1. The number of tillers and plant height were recorded at 25 days intervals. The maximum number of 26 and 27 tillers for BINA Dhan 11 and BRRI Dhan 34 were recorded. The longest plant height was observed with the T10 (V15M100) treatment. The treatment T3 (V15M100) resulted in maximum fresh weight of shoot and shoot dry matter production for both rice varieties in 1:3 mixed soil. Both varieties performed well in 1:3 mixed soils and elevated temperature conditions, as observed for normal soils. This evidence concluded that the improvement of calcareous and acid soils through their mixing is a successful approach and confirmed by the treatments' usual responses on different rice growth parameters under these mixed soils.

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Evaluation of growth and yield of selected hybrid and inbred rice varieties grown in net-house during transplanted aman season

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v34i1.5755 ◽

1970 ◽

Vol 34 (1) ◽

pp. 67-73

Author(s):

M SH Islam ◽

MSU Bhuiya ◽

AR Gomosta ◽

AR Sarkar ◽

MM Hussain

Keyword(s):

Leaf Area ◽

Plant Height ◽

Dry Matter ◽

Dry Weight ◽

Growth And Yield ◽

Rooting Depth ◽

Rice Varieties ◽

Root Dry Weight ◽

Matter Production ◽

1000 Grain Weight

Pot experiments were conducted during T. aman 2001 and 2002 (wet season) at Bangladesh Rice Research Institute (BRRI) in net house. Hybrid variety Sonarbangla-1 and inbred modern variety BRRI dhan-31 were used in both the seasons and BRRI hybrid dhan-l was used in 2002. The main objective of the experiments was to compare the growth and yield behaviour of hybrid and inbred rice varieties under controlled condition. In 2001, BRRI dhan-3l had about 10-15% higher plant height, very similar tillers/plant, 15-25% higher leaf area at all days after transplanting (DAT) compared to Sonarbangla-1. Sonarbangla- 1 had about 40% higher dry matter production at 25 DAT but had very similar dry matter production at 50 and 75 DAT, 4-11% higher rooting depth at all DATs, about 22% higher root dry weight at 25 DAT, but 5-10% lower root dry weight at 50 and 75 DAT compared to BRRI dhan-31. The photosynthetic rate was higher (20 μ mol m-2/sec-1) in BRRI dhan-3l at 35 DAT (maximum tillering stage) but at 65 DAT, Sonarbangla-l had higher photosynthetic rate of 19.5 μ mol m-2 sec-1. BRRI dhan-3l had higher panicles/plant than Sonarbangla-1, but Sonarbangla-1 had higher number of grains/panicle, 1000-grain weight and grain yield than BRRI dhan-31. In 2002, BRRI dhan-31 had the highest plant height at 25 DAT, but at 75 DAT, BRRI hybrid dhan-l had the highest plant height. Sonarbangla-1 had the largest leaf area at 25 and 50 DAT followed by BRRI dhan-31, but at 75 DAT, BRRI dhan-31 had the largest leaf area. The highest shoot dry matter was observed in BRRI dhan-31 followed by Sonarbangla-1 at all DATs. Sonarbangla-1 had the highest rooting depth and root dry weight at all DATs. BRRI dhan-31 gave the highest number of panicles/plant followed by Sonarbangla-I, BRRI hybrid dhan-l had the highest grains/panicle followed by BRRI dhan-31 and Sonarbangla-I had the highest 1000-grain weight followed by BRRI dhan-31. The highest amount of grains/plant (34.6 g) was obtained from BRRI dhan-31. Key Words: Shoot dry matter; root dry weight; leaf area; photosynthesis; grain yield. DOI: 10.3329/bjar.v34i1.5755Bangladesh J. Agril. Res. 34(1) : 67-73, March 2009

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Residual impact of wellgrow formulation and npk on growth and yield of wheat (Triticum aestivum L.)

Bangladesh Journal of Botany ◽

10.3329/bjb.v44i1.22738 ◽

2015 ◽

Vol 44 (1) ◽

pp. 143-146 ◽

Cited By ~ 56

Author(s):

VS Meena ◽

BR Maurya ◽

RS Meena

Keyword(s):

Triticum Aestivum ◽

Grain Yield ◽

Plant Height ◽

Dry Matter ◽

Growth Parameters ◽

Triticum Aestivum L ◽

Organic Manure ◽

Growth And Yield ◽

Straw Yield ◽

Matter Production

Effect of concentrate organic manure (wellgrow grain and wellgrow soil) and NPK improved the growth and yield of wheat. Significant improvement in terms of growth parameters like plant height, tillers, dry matter production and productive tillers with application of 120 : 60 : 60 NPK + 300 kg wellgrow soil/ha and at par with application of 120 : 60 : 60 NPK + 300 kg wellgrow grain/ha, treatment receiving 100% NPK + 300 kg wellgrow soil/ha resulted maximum grain yield (4545 kg /ha). Treatment of 100% NPK + 300 kg wellgrow grain/ha maintained higher straw yield (5715 kg/ha) and test weight (44.10 g) due to application of 100 % NPK along with 200 kg wellgrow soil/ha whereas it was at par with application of 75 and 100% NPK with both levels of wellgrow formulation. DOI: http://dx.doi.org/10.3329/bjb.v44i1.22738 Bangladesh J. Bot. 44(1): 143-146, 2015 (March)

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THE FFECT OF IRRIGATION LEVELS ON SOME VEGETATIVE GROWTH PARAMETERS AND YIELD OF RICE UNDER DRY FARMING SYSTEM

IRAQI JOURNAL OF AGRICULTURAL SCIENCES ◽

10.36103/ijas.v47i4.545 ◽

2016 ◽

Vol 47 (4) ◽

Author(s):

Hadi & Salem

Keyword(s):

Grain Yield ◽

Plant Height ◽

Growth Parameters ◽

Flag Leaf ◽

Irrigation Treatment ◽

Farming System ◽

Research Station ◽

Rice Varieties ◽

Irrigation Treatments ◽

Irrigation Levels

A field trial was carried out at the Rice Research Station in Mushkhab ( Najaf/ south of Iraq)State Broad for Agricultural Researches, during the Summer of 2013 in Clay Loam soil. The experiment was laid in split plot with two replications, to test the drought tolerance of different local and foreign varieties of rice .Rice varieties used were 6 varieties of aerobic rice from the International Rice Research Institute(IRRI) and local cultivars Anber33 and Jasmine. Two methods of irrigation ,flood irrigation, and 6 irrigation levels at "-10,-33,-50,-100 KPa" were used in this investigation .Studied parameters were: plant height ,spike length, flag leaf area, % of infertility , weight of 1000 grains and grain yield. Results indicated that varieties and irrigation treatments and their interaction had no significant differences on % of infertility and plant height .Varieties had significant effect on grain yield while irrigation treatment effected significantly on weight of 1000 grains. Interaction between varieties and irrigation had no significant effect on % of infertility , weight of 1000 grains and grain yield. Besides, irrigation treatments and varieties and their interaction had no significant effect on deltoid length.

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Growth Parameters of Transplant Aman Rice (cv. BRRI dhan 52) as Influenced by Age of Tiller Seedlings, Number of Tiller Seedlings Hill-1 and Level of USG

Journal of Environmental Science and Natural Resources ◽

10.3329/jesnr.v6i2.22104 ◽

2015 ◽

Vol 6 (2) ◽

pp. 101-108

Author(s):

KS Rahman ◽

SK Paul ◽

MAR Sarkar ◽

MS Islam

Keyword(s):

Natural Resources ◽

Plant Height ◽

Dry Matter ◽

Growth Parameters ◽

Block Design ◽

Dry Matter Production ◽

Control Treatment ◽

Matter Production ◽

Randomized Complete Block Design ◽

Effect Of Age

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh to investigate the effect of age of tiller seedlings, number of tiller seedlings hill-1 and application of urea super granules (USG) on the growth parameters of transplant aman rice cv. BRRI dhan52. The experiment comprised two ages of tiller seedlings viz. 25 and 35 days old, three levels of tiller seedling hill-1 viz.1, 3 and 5 seedlings hill-1 and three USG levels viz. 0, 1.8 and 2.7g USG. The experiment was laid out in a Randomized Complete Block Design with three replications. The highest and lowest plant height was found by transplanting 25-day and 35-day old tiller seedlings at all dates of observations. By transplanting 35-day old tiller seedlings total dry matter hill-1 was found highest at 15DAT and 45 DAT. Total dry matter hill-1 was the highest in 5 tiller seedlings hill-1 and it was in lowest in 1 tiller seedling hill-1. Plant height was the highest in 5 tiller seedlings hill-1 which was as good as that of 3 tiller seedlings hill-1 and the lowest one was found in 1 tiller seedling hill-1 at 15 DAT. The tallest plant and highest total dry matter hill-1 were observed in 1.8g USG and the lowest one was observed in control treatment. Transplant Aman rice can be grown by transplanting 25-day old tiller seedling, 5 tiller seedlings hill-1 and by applying 1.8g USG for the highest plant height, more tiller and total dry matter production hill-1.DOI: http://dx.doi.org/10.3329/jesnr.v6i2.22104 J. Environ. Sci. & Natural Resources, 6(2): 101-108 2013

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Variations of Growth Parameters in Some Aromatic Rice Verities under Salt Stress

Bangladesh Agronomy Journal ◽

10.3329/baj.v19i2.31847 ◽

2017 ◽

Vol 19 (2) ◽

pp. 1-10

Author(s):

Md Habibur Rahman ◽

Md Abu Naim ◽

Md Abdul Matin ◽

Taufika Islam Anee ◽

Md Amzad Hossain ◽

...

Keyword(s):

Salt Stress ◽

Plant Height ◽

Growth Parameters ◽

The Other ◽

Aromatic Rice ◽

Saline Condition ◽

Growth Duration ◽

Rice Varieties ◽

Growth Physiology ◽

Local Variety

A pot experiment with six aman rice varieties viz. BRRI dhan34, BRRI dhan38, Binadhan-9, Binadhan-13, Kalijira and Rajbhogh was conducted at the experimental shed of the Department of Agronomy, Sher-e Bangla Agricultural University, Dhaka during the period of June- December, 2014 to investigate the effect of salinity on the growth, physiology and yield of some aromatic rice under different salt stress conditions. The experiment was carried out with five salt stress treatments viz. control (without salt), S25 (25 mM NaCl), S50 (50 mM NaCl), S75 (75 mM NaCl) and S100 (100 mM NaCl). Salt stress significantly reduced the plant height, tiller hill-1 and leaves hill-1 of these varieties at all growth duration. Among the varieties Binadhan-9 and BRRI dhan38 performed better under saline condition. On the other hand, local variety Kalijira did not perform well under saline condition.Bangladesh Agron. J. 2016, 19(2): 1-10

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Agronomic performance of autumn- and winter-cropped Indian mustard (Brassica juncea L.) in response to varying levels of nitrogen fertiliser

Annales Universitatis Paedagogicae Cracoviensis Studia Naturae ◽

10.24917/25438832.5.6 ◽

2020 ◽

pp. 83-95

Author(s):

Bent Al-Hoda Asghari ◽

Mohsen Yousefi ◽

Katarzyna Możdżeń ◽

Joanna Puła ◽

Peiman Zandi ◽

...

Keyword(s):

Brassica Juncea ◽

Seed Yield ◽

Agronomic Traits ◽

Growth Parameters ◽

Indian Mustard ◽

Climatic Conditions ◽

Plant Seed ◽

Nitrogen Fertiliser ◽

Nitrogen Levels ◽

Cropping Seasons

Indian mustard (Brassica juncea L. Czern) cultivation is suggested for regions with short seasons and low rainfall. Although there have been many studies conducted on agronomic production of mustard in Iran, the information regarding the interactive impact of cropping seasons and nitrogen fertiliser on growth characteristics and yield quality of mustard plant is still insufficient and requires further investigation. This study focused on the possible implications of different cropping seasons and different nitrogen levels on selected agronomic traits in mustard. In this experiment, five different doses of nitrogen and two sowing periods were used to assess for their combined effects on the growth parameters, seed yield and agronomic characteristics of mustard in the semi-arid climatic conditions of Takestan. The results revealed that cultivation seasons and nitrogen rates had a significant effect on plant height, biomass yield, number of siliques per plant, seed oil content and seed yield.

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A Sensitivity Analysis of the SPACSYS Model

Agriculture ◽

10.3390/agriculture11070624 ◽

2021 ◽

Vol 11 (7) ◽

pp. 624

Author(s):

Yan Shan ◽

Mingbin Huang ◽

Paul Harris ◽

Lianhai Wu

Keyword(s):

Sensitivity Analysis ◽

Wheat Yield ◽

Climatic Conditions ◽

Water Dynamics ◽

Ecological Modelling ◽

Soil Conditions ◽

Model Parameters ◽

Nutrient Inputs ◽

Nutrient Pool ◽

Wheat Field

A sensitivity analysis is critical for determining the relative importance of model parameters to their influence on the simulated outputs from a process-based model. In this study, a sensitivity analysis for the SPACSYS model, first published in Ecological Modelling (Wu, et al., 2007), was conducted with respect to changes in 61 input parameters and their influence on 27 output variables. Parameter sensitivity was conducted in a ‘one at a time’ manner and objectively assessed through a single statistical diagnostic (normalized root mean square deviation) which ranked parameters according to their influence of each output variable in turn. A winter wheat field experiment provided the case study data. Two sets of weather elements to represent different climatic conditions and four different soil types were specified, where results indicated little influence on these specifications for the identification of the most sensitive parameters. Soil conditions and management were found to affect the ranking of parameter sensitivities more strongly than weather conditions for the selected outputs. Parameters related to drainage were strongly influential for simulations of soil water dynamics, yield and biomass of wheat, runoff, and leaching from soil during individual and consecutive growing years. Wheat yield and biomass simulations were sensitive to the ‘ammonium immobilised fraction’ parameter that related to soil mineralization and immobilisation. Simulations of CO2 release from the soil and soil nutrient pool changes were most sensitive to external nutrient inputs and the process of denitrification, mineralization, and decomposition. This study provides important evidence of which SPACSYS parameters require the most care in their specification. Moving forward, this evidence can help direct efficient sampling and lab analyses for increased accuracy of such parameters. Results provide a useful reference for model users on which parameters are most influential for different simulation goals, which in turn provides better informed decision making for farmers and government policy alike.

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Optimizing hydroponic culture media and NO3−/NH4+ ratio for improving essential oil compositions of purple coneflower (Echinacea purpurea L.)

Scientific Reports ◽

10.1038/s41598-021-87391-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Fatemeh Ahmadi ◽

Abbas Samadi ◽

Ebrahim Sepehr ◽

Amir Rahimi ◽

Sergey Shabala

Keyword(s):

Particle Size ◽

Essential Oil ◽

Plant Growth ◽

Plant Height ◽

Growth Parameters ◽

Echinacea Purpurea ◽

Peat Moss ◽

Root Weight ◽

Total Biomass ◽

Growing Media

AbstractMedicinal plants represent a valuable commodity due to beneficial effects of their natural products on human health, prompting a need for finding a way to optimize/increase their production. In this study, a novel growing media with various perlite particle size and its mixture with peat moss was tested for hydroponic-based production of Echinacea purpurea medicinal plant under greenhouse conditions. The plant growth parameters such as plant height, total fresh leave weight, fresh root weight, total biomass, total chlorophyll, leaf area, and essential oil compositions were assessed. Perlite particle size in the growing media was varied from very coarse (more than 2 mm) to very fine (less than 0.5 mm), and the ratio between perlite and peat moss varied from 50:50 v/v to 30:70 v/v. In addition, two nitrate (NO3−) to ammonium (NH4+) ratios (90:10 and 70:30) were tested for each growing media. The medium containing very fine-grade perlite and 50:50 v/v perlite to peat moss ratio was found to be most optimal and beneficial for E. purpurea performance, resulting in maximal plant height, fresh and dry weight, leaf surface area, and chlorophyll content. It was also found that an increase in NO3−/NH4+ ratio caused a significant increase in plant growth parameters and increase the plant essential oil content. The major terpene hydrocarbons found in extract of E. purpurea with the best growth parameters were germacrene D (51%), myrcene (15%), α-pinene (12%), β-caryophyllene (11%), and 1-Pentadecene (4.4%), respectively. The percentages of these terpene hydrocarbons were increased by increasing of NO3−/NH4+ ratio. It can be concluded that decreasing the perlite particle size and increasing the NO3−/NH4+ ratio increased the plant growth parameters and essential oil compositions in E. purpurea.

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Effects of Rootstocks on Blade Nutritional Content of Two Minority Grapevine Varieties Cultivated under Hyper-Arid Conditions in Northern Chile

Agronomy ◽

10.3390/agronomy11020327 ◽

2021 ◽

Vol 11 (2) ◽

pp. 327

Author(s):

Nicolás Verdugo-Vásquez ◽

Gastón Gutiérrez-Gamboa ◽

Emilio Villalobos-Soublett ◽

Andrés Zurita-Silva

Keyword(s):

Climatic Conditions ◽

Soil Conditions ◽

Northern Chile ◽

High Tolerance ◽

Nutritional Content ◽

Pests And Diseases ◽

Arid Conditions ◽

High K ◽

Warm Weather ◽

Nutritional Imbalance

In the 90s, as in other countries, transformation of Chilean viticulture brought about the introduction and spread of European grapevine varieties which has resulted in a massive loss of minor local and autochthonous grapevine varieties traditionally grown in several wine growing regions. Fortunately, in recent years, autochthonous and minority varieties have been revalued due to their high tolerance to pests and diseases and because of their adaptation to thermal and water stress triggered by global warming. In this study, we assessed the nutritional status of two autochthonous grapevines grafted onto four different rootstocks under the hyper-arid climatic conditions of Northern Chile over three consecutive seasons. The results showed that R32 rootstock induced high N, P, Ca, Mg and Mn levels in blades compared to Harmony rootstock. R32 rootstock and to a lesser extent, 1103 Paulsen and 140 Ruggeri rootstocks kept balanced levels of nutrients in blades collected from Moscatel Amarilla and Moscatel Negra grapevine varieties. Additionally, Harmony presented slight nutritional imbalance compared to the rest of studied rootstocks due to its low absorption of Mg, Mn, Ca and P, and its high K absorption, which was exacerbated under warm weather and salinity soil conditions. These results may provide a basis for specific cultivar/rootstock/site combinations, a nutritional guide for the viticulturists of Northern Chile, and options to diversify their production favoring the use of minority and autochthonous varieties that adapt well to hyper-arid conditions of Northern Chile.

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Improved Rice Technology Adoption: The Role of Spatially-Dependent Risk Preference

Agriculture ◽

10.3390/agriculture11080691 ◽

2021 ◽

Vol 11 (8) ◽

pp. 691

Author(s):

Omotuyole Isiaka Ambali ◽

Francisco Jose Areal ◽

Nikolaos Georgantzis

Keyword(s):

Field Experiments ◽

Climatic Factors ◽

Risk Preferences ◽

Risk Preference ◽

Probit Model ◽

Climatic Conditions ◽

High Yield ◽

Risk Attitudes ◽

Policy Action ◽

Rice Varieties

This study analyses farmers’ adoption of improved rice technology, taking into account farmers’ risk preferences; the unobserved spatial heterogeneity associated with farmers’ risk preferences; farmers’ household and farm characteristics; farm locations, farmers’ access to information, and their perceptions on the rice improved varieties (i.e., high yield varieties, HYV). The study used data obtained from field experiments and a survey conducted in 2016 in Nigeria. An instrumental-variable probit model was estimated to account for potential endogenous farmers’ risk preference in the adoption decision model. Results show that risk averse (risk avoidant) farmers are less likely to adopt HYV, with the spatial lags of farmers’ risk attitudes found to be a good instrument for spatially unobserved variables (e.g., environmental and climatic factors). We conclude that studies supporting policy action aiming at the diffusion of improved rice varieties need to collect information, if possible, on farmers’ risk attitudes, local environmental and climatic conditions (e.g., climatic, topographic, soil quality, pest incidence) in order to ease the design and evaluation of policy actions on the adoption of improved agricultural technology.

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