scholarly journals Emerging Minor Diseases of Rice in India: Losses and Management Strategies

2021 ◽  
Author(s):  
Raghu Shivappa ◽  
Devanna B. Navadagi ◽  
Mathew Seikholen Baite ◽  
Manoj Kumar Yadav ◽  
Prabhukarthikeyan S. Rathinam ◽  
...  
Keyword(s):  
Management Practices ◽  
Gene Pyramiding ◽  
Resistance Breeding ◽  
Climatic Conditions ◽  
Rice Cultivation ◽  
Brown Spot ◽  
Management Measures ◽  
Cultivation Practices ◽  
Growing Conditions ◽  
Stable Source

Rice (Oryza sativa L) being one of the imperative food crops of the word contributes immensely to the food and nutritional security of India. The cultivation of rice is changed over the decades from a simple cultivation practices to the advanced cultivation to increase yield. Increased in rice yields especially after 1960s is mainly due to the introduction of high yielding semi-dwarf varieties which requires more inputs like chemical fertilizers, water and other resources. As a result, India achieved self sufficiency in rice and currently producing more than 115 MT of rice to meet country’s demand. Now India is exporting rice to other nations and earning foreign returns. With the change in rice cultivation practices, problems also aroused side by side. A number of biotic and abiotic stresses emerged as major constraints for rice cultivation in diverse agro-climatic conditions and growing ecologies. Diseases are the major biotic constraints to rice which can reduce the yields by 20–100% based on severity. Major diseases like blast, brown spot, bacterial blight, sheath blight and tungro still causing more damage and new minor diseases like bakanae, false smut, grain discoloration, early seedling blight, narrow brown spot, sheath rot have emerged as major problems. The losses due to these diseases may 1–100% based on the growing conditions, varietal susceptibility etc.., At present no significant source of resistance available for any of the above emerging diseases. But looking into the severity of these diseases, it is very important to address them by following integrated management practices like cultural, mechanical, biological and finally chemical control. But more emphasis has to be given to screen gerrmplasm against these diseases and identify stable source of resistance. Finally utilizing these sources in resistance breeding program by employing molecular breeding tools like marker assisted selection (MAS), marker assisted back cross breeding (MABB), gene pyramiding and transgenic tools. The present chapter discusses the importance of these emerging minor diseases of rice, the losses and possible management measures including resistance breeding.

PENGARUH ZEOLIT DALAM PUPUK TERHADAP PERTUMBUHAN DAN PRODUKSI PADI SAWAH DI KABUPATEN BADUNG PROVINSI BALI

2013 ◽  
Vol 14 (3) ◽  
Author(s):  
Akhmad Jufri ◽  
Mochamad Rosjidi
Keyword(s):  
Field Experiment ◽  
Rainy Season ◽  
Rice Cultivation ◽  
Lowland Rice ◽  
Cultivation Practices

Many efforts are conducted to increase the fertilising efficiency, especially nitrogen in rice cultivation practices. This field experiment was conducted to evaluate the effect of zeolite on growth and production of lowland rice during rainy season in Badung, Bali. The experiment showed that fertilizer mixed with zeolite resulted in the same growth and productivity, although the fertilising doses was reduced. This means that zeolite incread fertilising efficiency in rice cultivation.

scholarly journals Environmental Drivers and Age Trends in Site Productivity for Oak in Southern Poland

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 209
Author(s):  
Luiza Tymińska-Czabańska ◽  
Jarosław Socha ◽  
Marek Maj ◽  
Dominika Cywicka ◽  
Xo Viet Hoang Duong
Keyword(s):  
Nitrogen Deposition ◽  
Management Practices ◽  
Additive Model ◽  
Climatic Conditions ◽  
Environmental Indicators ◽  
Environmental Drivers ◽  
Site Productivity ◽  
Site Factors ◽  
Wide Range ◽  
Si Model

Site productivity provides critical information for forest management practices and is a fundamental measure in forestry. It is determined using site index (SI) models, which are developed using two primary groups of methods, namely, phytocentric (plant-based) or geocentric (earth-based). Geocentric methods allow for direct site growth modelling, in which the SI is predicted using multiple environmental indicators. However, changes in non-static site factors—particularly nitrogen deposition and rising CO2 concentration—lead to an increase in site productivity, which may be visible as an age trend in the SI. In this study, we developed a geocentric SI model for oak. For the development of the SI model, we used data from 150 sample plots, representing a wide range of local topographic and site conditions. A generalized additive model was used to model site productivity. We found that the oak SI depended predominantly on physicochemical soil properties—mainly nitrogen, carbon, sand, and clay content. Additionally, the oak SI value was found to be slightly shaped by the topography, especially by altitude above sea level, and topographic position. We also detected a significant relationship between the SI and the age of oak stands, indicating the long-term increasing site productivity for oak, most likely caused by nitrogen deposition and changes in climatic conditions. The developed geocentric site productivity model for oak explained 77.2% of the SI variation.

scholarly journals Potential Use of Organic- and Hard-Rock Mine Wastes on Aided Phytostabilization of Large-Scale Mine Tailings under Semiarid Mediterranean Climatic Conditions: Short-Term Field Study

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Claudia Santibañez ◽  
Luz María de la Fuente ◽  
Elena Bustamante ◽  
Sergio Silva ◽  
Pedro León-Lobos ◽  
...  
Keyword(s):  
Mine Tailings ◽  
Large Scale ◽  
Management Practices ◽  
Hard Rock ◽  
Mine Waste ◽  
Organic Amendments ◽  
Dry Weight ◽  
Climatic Conditions ◽  
Goat Manure ◽  
Site Rehabilitation

The study evaluated the efficacy of organic- and hard-rock mine waste type materials on aided phytostabilization of Cu mine tailings under semiarid Mediterranean conditions in order to promote integrated waste management practices at local levels and to rehabilitate large-scale (from 300 to 3,000 ha) postoperative tailings storage facilities (TSFs). A field trial with 13 treatments was established on a TSF to test the efficacy of six waste-type locally available amendments (grape and olive residues, biosolids, goat manure, sediments from irrigation canals, and rubble from Cu-oxide lixiviation piles) during early phases of site rehabilitation. Results showed that, even though an interesting range of waste-type materials were tested, biosolids (100 t ha-1dry weight, d.w.) and grape residues (200 t ha-1d.w.), either alone or mixed, were the most suitable organic amendments when incorporated into tailings to a depth of 20 cm. Incorporation of both rubble from Cu-oxide lixiviation piles and goat manure into upper tailings also had effective results. All these treatments improved chemical and microbiological properties of tailings and lead to a significant increase in plant yield after three years from trial establishment. Longer-term evaluations are, however required to evaluate self sustainability of created systems without further incorporation of amendments.

Environmental factors including management practices as correlates of weed community composition in spring seeded crops

1992 ◽  
Vol 70 (10) ◽  
pp. 1931-1939 ◽  
Author(s):  
M. R. T. Dale ◽  
A. G. Thomas ◽  
E. A. John
Keyword(s):  
Community Composition ◽  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Environmental Variables ◽  
Management Practices ◽  
Geographic Region ◽  
Climatic Conditions ◽  
Weed Species ◽  
Weed Communities ◽  
Seed Crops

The relationship between the weed communities and environmental variables such as soil, crop, and management was investigated in two provinces of Canada. The frequencies of weed species were recorded in cereal and oilseed fields in Saskatchewan (2244 fields over 4 years) and Manitoba (864 fields over 3 years), Canada. Information on some of the physical characteristics of the fields and on the management practices imposed on them was also collected, in part by questionnaire. The two kinds of data were ordinated together using canonical correspondence analysis to assess the relationships between the species and the environmental variables. In the Saskatchewan data, there was a clear and consistent separation of the species into groups along an axis correlated with soil zone and the associated climatic gradient. In the Manitoba data, the same groups of species did not separate as clearly or as consistently, although geographic region was a major determinant of the weed communities. The greater variability may be due to the fact that the gradient of soil types is much more restricted in Manitoba and not as closely correlated with climatic conditions. In both provinces, culture practices were less important as correlates of the weed community composition than soil type or, to a certain extent, the previous crop. Key words: canonical correspondence analysis, cereal crops, oil seed crops.

scholarly journals Spatialized N budgets in a large agricultural Mediterranean watershed: high loading and low transfer

2012 ◽  
Vol 9 (1) ◽  
pp. 57-70 ◽  
Author(s):  
L. Lassaletta ◽  
E. Romero ◽  
G. Billen ◽  
J. Garnier ◽  
H. García-Gómez ◽  
...  
Keyword(s):  
River Basin ◽  
Management Practices ◽  
N Fertilization ◽  
Irrigated Agriculture ◽  
N Budget ◽  
Ebro River ◽  
N Retention ◽  
Management Measures ◽  
Mediterranean Regions ◽  
Food And Feed

Abstract. Despite the particular management practices and climate characteristics of the Mediterranean regions, the literature dealing with N budgets in large catchments subjected to Mediterranean conditions is scarce. The present study aims to deepen our knowledge on the N cycle within the Ebro River Basin (NE Spain) by means of two different approaches: (1) calculating a global N budget in the Ebro River Basin and (2) calculating a series of detailed regional budgets at higher geographical resolution. N inputs and outputs were spatialized by creating a map based on the most detailed information available. Fluvial and atmospheric N export was estimated together with N retention. The Ebro River Basin annually receives a relatively high amount of new N (5118 kg N km−2 yr−1), mostly in the form of synthetic fertilizers (50%). Although it is a highly productive catchment, the net N input as food and feed import is also high (33%). Only 8% of this N is finally exported to the delta zone. Several territorial units characterized by different predominant uses (rainfed agriculture, irrigated agriculture and pastures) have differentiated N dynamics. However, due to the high density of irrigation channels and reservoirs that characterize Mediterranean catchments, N retention is very high in all of them (median value, 91%). These results indicate that problems of eutrophication due to N delivery in the coastal area may not be too severe but that high N retention values may instead lead to problems within the catchment, such as pollution of aquifers and rivers, as well as high atmospheric emissions. The most promising management measures are those devoted to reducing agricultural surpluses through a better balanced N fertilization.

Source apportionment of riverine nitrogen transport based on catchment modelling

1996 ◽  
Vol 33 (4-5) ◽  
pp. 109-115 ◽  
Author(s):  
Hans B. Wittgren ◽  
Berit Arheimer
Keyword(s):  
Source Apportionment ◽  
River Basin ◽  
Management Practices ◽  
Arable Land ◽  
Treatment Plant ◽  
River Mouth ◽  
Point Sources ◽  
Nitrogen Transport ◽  
Total N ◽  
Management Measures

Source apportionment of river substance transport, i.e. estimation of how much each source in each subbasin contributes to the river-mouth transport, is a vital step in achieving the most efficient management practices to reduce pollutant loads to the sea. In this study, the spatially lumped (at sub-catchment level), semi-empirical PULSE hydrological model, with a nitrogen routine coupled to it, was used to perform source apportionment of nitrogen transport in the Söderköpingsån river basin (882 km2) in south-eastern Sweden, for the period 1991–93. The river basin was divided into 28 subbasins and the following sources were considered: land leakage from the categories forest, arable and ley/pasture; point sources, and; atmospheric deposition on lake surfaces. The calibrated model yielded an explained variance of 60%, based on comparison of measured and modelled river nitrogen (Total N) concentrations. Eight subbasins, with net contributions to the river-mouth transport exceeding 3 kg ha−1 yr−1, were identified as the most promising candidates for cost efficient nitrogen management. The other 20 subbasins all had net contributions below 3 kg ha−1 yr−1. Arable land contributed 63% of the nitrogen transport at the river mouth and would thus be in focus for management measures. However, point sources (18% contribution to net transport) should also be considered due to their relatively high accessibility for removal measures (high concentrations). E.g., the most downstream subbasin, with the largest wastewater treatment plant in the whole river basin, had a net contribution of 16 kg ha−1 yr−1. This method for source apportionment may provide authorities with quantitative information about where in a river basin, and at which sources, they should focus their attention. However, once this is done, an analysis with higher resolution has to be performed in each of the interesting subbasins, before decisions on actual management measures can be taken.

scholarly journals Characteristics of industrial cultivation and requirements to fresh cut flowers in the Russian Federation

2020 ◽  
pp. 126-129
Author(s):  
O. A. Shchuklina ◽  
I. N. Voronchikhina ◽  
A. D. Alenicheva ◽  
I. N. Klimenkova ◽  
V. V. Voronchikhin ◽  
...  
Keyword(s):  
Russian Federation ◽  
Open Data ◽  
Climatic Conditions ◽  
Research Field ◽  
Cut Flowers ◽  
Open Ground ◽  
The Russian Federation ◽  
Fresh Cut ◽  
Growing Conditions ◽  
Analytical Centers

Relevance. The specifics of the fresh cut flowers market in the Russian Federation is such, that 85-100% of the total volume of flowers sold is imported. The most popular flowers among Russian consumers are roses (up to 60% in the total share of fresh flowers), chrysanthemums and carnations, all of which require certain growing conditions. Recently, the market of local seasonal flowers has begun to develop, the main players in which are small farms or household plots. Material and methods. This article presents the data about market analysis of fresh cut flowers in Russia for the last five years (2015-2020). For this analysis were used the methods applied in economics. The main information database of this research includes data from official state statistics; open data from analytical centers; federal and regional regulations; data from the Federal agency for technical regulation and Metrology; reference materials of specialized data on research field; data from industry-specific portals; sites; articles and reviews written by producers of fresh cut flowers in Russia and worldwide. Results. Russia is one of the top six importers of fresh cut flowers in the world. The most popular flower among Russian consumers is a rose. There is not much suitable soil and climatic conditions in Russia for growing it on a commercial scale in the open ground. In 2018-2019 according to Rosstat data the number of flowers, grown for cutting in Russia, was estimated 263,3 billion pieces. However, now Russian flower producers are not able to meet domestic demand for fresh flowers, so there is no almost export.

scholarly journals Productivity of sorghum crops depending on agrotechnical methods of cultivation in the regions of the Russian Federation (review)

2021 ◽  
Vol 22 (2) ◽  
pp. 155-166
Author(s):  
O. P. Kibalnik ◽  
I. G. Efremova ◽  
Yu. V. Bochkareva ◽  
A. V. Prakhov ◽  
D. S. Semin
Keyword(s):  
Russian Federation ◽  
Plant Density ◽  
Climatic Conditions ◽  
Row Spacing ◽  
Early Maturing ◽  
Cultivation Technology ◽  
The Russian Federation ◽  
Area Unit ◽  
Growing Conditions

The review considers the unique diversity and versatility of the use of sorghum crops. The dependence of the yield of biomass and grain of varieties and hybrids of sorghum crops on the applied elements of the crop cultivation technology is analyzed: width of row spacing, density of standing plants in different zones of sorghum sowing in the Russian Federation. A variety of soil and climatic conditions of sorghum cultivation regions differ in the temperature regime, the reserves of soil moisture before sowing, the level of soil fertility, which determines the need to select the optimal elements of technology that ensure the achievement of the highest yield of varieties per unit area with the lowest material and technological costs. The analysis of the ways of placing plants on the own area also indicates the significant role of varietal biological features in increasing the sorghum yield, the purpose of sowing, and the level of field contamination. With limited resources of productive moisture for high-yielding sorghum varieties with a powerful habitus, wide-row sowing with row spacing of 70 cm and the density of standing plants 80-350 thousand per 1 ha, depending on the variety. Low-growing early-maturing thin-stemmed forms of grain sorghum should be sown in the usual ordinary row way with a row spacing of 15 or 30 cm with plant density of 500-600 thousand/ha. Sudan grass varieties that can withstand high density of standing plants (depending on agroclimatic conditions – up to 1.0-3.0 million per 1 ha) are cultivated using the technology of spiked cereals. As the result of the literature data analysis, the following trend has been revealed: the drier the growing conditions, the greater the requirements for choosing the optimal parameters of agrotechnical methods of cultivating sorghum crops aimed at the reducing the number of plants per area unit considering the specific character of the region of sorghum sowing.

scholarly journals Variability assessment of productivity traits and quality of berries in the genetic collection of garden strawberry (Fragaria ananassa Duch.) in the Orenburg region

2021 ◽  
Vol 845 (1) ◽  
pp. 012015
Author(s):  
E V Aminova ◽  
R R Salimova ◽  
O E Merezhko
Keyword(s):  
Field Experiments ◽  
Sugar Content ◽  
Climatic Conditions ◽  
Soluble Solids ◽  
Average Weight ◽  
Marketable Yield ◽  
Berry Quality ◽  
Growing Conditions ◽  
Productivity Potential

Abstract Nowadays the study of the interrelation of the genotype of strawberry plants in garden and climatic conditions is extremely relevant. Due to the various systems of genetic control and the modifying effects of growing conditions on the manifestation of quantitative traits, there is the need to assess the genotypic variability of economically valuable features, focused on the identification of genotypes characterized by stability and adaptive qualities in growing conditions. The study examined 15 varieties of garden strawberries of domestic and foreign selection. The field experiments and surveys were carried out according to the Program generally accepted in the Russian Federation and methodology for the variety study of fruit, berry and nut crops. We studied such features as the number of peduncles (pcs/bush), number of berries (pcs/bush), average weight of berries (g), total and marketable yield (g/bush), sugar content in berries, soluble solids and ascorbic acid. The purpose of this work was to assess the genotype-year interrelation in terms of the variability of productivity features and berry quality and to identify strawberry varieties with a stable genotype. As a result of two-way analysis of variance for the variety-year interrelation, the obtained values were 1.10-8.50 at standard Fst. - 1.24. Statistically important differences had indicators of productivity of a bush between the first and second clusters (t = 5.89 at p <0.01), the first and third (t = 15.83 at p <0.01), the second and third clusters (t = 8.13 at p <0.01), as well as the average berry weight between the first and third, second and third clusters (t = 15.50 and 6.99 at p <0.01, respectively). Significant differences in the value of the Euclidean distance were revealed for varieties Mishutka (54.5), Daryonka (54.5), Pervoklassnitsa (58) realizing their productivity potential in different years of cultivation.

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