Green manuring and nitrogen fertilization effects on soil chemical properties, agronomic traits and grain yield of upland rice

2008 ◽  
Vol 7 (1) ◽  
Author(s):  
SO Adigbo ◽  
K O Okeleye
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Agronomic Traits ◽  
Upland Rice ◽  
Chemical Properties ◽  
Soil Chemical Properties ◽  
Green Manuring ◽  
Fertilization Effects

scholarly journals Straw and early nitrogen fertilization affect soil properties and upland rice yield

2016 ◽  
Vol 46 (3) ◽  
pp. 284-291 ◽  
Author(s):  
Adriano Stephan Nascente ◽  
Anna Cristina Lanna
Keyword(s):  
Microbial Biomass ◽  
Nitrate Reductase ◽  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Upland Rice ◽  
Microbial Biomass Carbon ◽  
Biomass Carbon ◽  
Early Application ◽  
Total N ◽  
Rice Plants

ABSTRACT The presence of cover crop straw and early application of total N at sowing may provide significant changes in the microbial population, reflecting on the N dynamics in the soil and in upland rice plants. This study aimed at determining the effect of the early application of nitrogen doses as mineral N and microbial biomass carbon in the soil, as well as in the activity of nitrate reductase, and grain yield of upland rice plants cultivated under no-tillage system (NTS). A randomized blocks design, in a split-plot scheme, with four replications, was used. The treatments consisted of N doses (0 kg ha-1, 40 kg ha-1, 80 kg ha-1 and 120 kg ha-1) and the presence or absence of U. brizantha cover straw. Maintaining the straw on the soil surface reduces the ammonium levels and increases the microbial biomass carbon content of the soil. The application of increasing doses of N in the soil provides increases in the levels of nitrate and ammonium in the soil up to 28 days after emergence. The activity of the nitrate reductase enzyme in the plants increases and the contents of ammonium and nitrate in the soil decrease with the crop development. The number of panicles and grain yield of upland rice increase with the increase of the nitrogen fertilization, but decrease in the presence of U. brizantha straw. Thus, it is recommend the use of early N fertilization in upland rice crop.

scholarly journals Effects of silicate application on soil fertility and wheat yield

2015 ◽  
Vol 36 (6Supl2) ◽  
pp. 4071 ◽  
Author(s):  
Marcos Vinícius Mansano Sarto ◽  
Maria do Carmo Lana ◽  
Leandro Rampim ◽  
Jean Sérgio Rosset ◽  
Jaqueline Rocha Wobeto
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Wheat Yield ◽  
Chemical Properties ◽  
Magnesium Silicate ◽  
Exchange Capacity ◽  
Soil Chemical Properties ◽  
Randomized Block Design ◽  
Fe And Mn ◽  
Calcium Magnesium

<p>An improvement in soil chemical properties and crop development with silicate application has been confirmed in several plant species. The effects of silicate application on soil chemical properties and wheat growth were investigated in the present study. The experiment was carried out in 8-L plastic pots in a greenhouse. Treatments were arranged in a randomized block design in a 3 × 5 factorial: three soils [Rhodic Acrudox (Ox1), Rhodic Hapludox (Ox2) and Arenic Hapludult (Ult)] and five silicate rates (0, 1, 2, 4 and 6 Mg ha–1 of calcium/magnesium silicate), with four replications. The plant length, number of spikes per pot, shoot dry matter and grain yield, were measured after 115 days of wheat (<em>Triticum aestivum </em>L.) growth. Changes in the soil chemical properties (pH, H+ + Al3+, Al3+, P, K, Ca, Mg, Si, Cu, Zn, Fe and Mn) were analyzed after wheat harvest. Application of calcium/magnesium silicate reduces the potential acidity (H+ + Al3+) and Al3+ phytotoxic; and increases the soil pH, available Ca, Mg and Si, cation exchange capacity (CEC) and soil base saturation. Silicate application did not affect the available P, exchangeable K and availability of micronutrients (Cu, Zn, Fe and Mn) in the three soils. The application of calcium/magnesium silicate in an acid clayey Rhodic Hapludox improves the development and yield of wheat; however, the silicate application in soil with pH higher to 5.3 and high Si availability does not affect the agronomic characteristics and grain yield of wheat.</p><p><strong> </strong></p>

scholarly journals Evaluation of Yields of Selected Upland Rice (Oryza sativa L) Varieties in a Humid Environment

2020 ◽  
pp. 77-84
Author(s):  
A. I. Nwonuala ◽  
L. D. Gbaraneh
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Block Design ◽  
State University ◽  
Yield Performance ◽  
Cropping Season ◽  
Port Harcourt ◽  
Rivers State

This study is aimed to evaluate the yield performance of 12 varieties of upland rice and to assess the agronomic traits that contribute to yield performance of these varieties. A 2-year field experiment was conducted in the Teaching and Research Farm of the Rivers State University, Port Harcourt, Nigeria. The twelve varieties which made up the twelve treatments were laid out in a Randomized Complete Block Design (RCBD) and replicated three times. The experimental site was loamy sand, medium acidic with the soil pH reduced in the second cropping season (pH 4.9 in 2012; and pH 4.8 in 2013). The varieties differed significantly amongst themselves in panicle weight, number of fertile spikelets, grain length/breath ratio, 1000 grain weight in 2012 and 2013 planting and grain yield in 2012 planting season. The ITA 321 had the highest yield of 10300.33 kg/ha in 2012 and 10533.33 kg/ha in 2013 followed by NERICA 1 having 9066.67 kg/ha (2012) and 9133.33 kg/ha (2013). The NERICA 2,3,4,5 and 6 also belonged to the high yielding group while APO, Vandana,  IR68 and ITA 150 recorded lower yields. Results of this evaluation have shown that ITA 321 and NERICA 1 can be grown in the tropical rainforest zone for paddy grain yield rather than ITA 150 which are already in use in this agro-ecological zone. They are recommended also for adoption and use in rice production instead of the popular ITA 150.

scholarly journals Lime, manure and Inorganic Fertilizer Effects on Soil Chemical Properties, Maize Yield and Profitability in Acidic Soils in Central Highlands of Kenya

2021 ◽  
pp. 40-51
Author(s):  
W. Winnie Kimiti ◽  
M. W. Mucheru-Muna ◽  
J. N. Mugwe ◽  
K. F. Ngetich ◽  
M. N. Kiboi ◽  
...  
Keyword(s):  
Grain Yield ◽  
Chemical Properties ◽  
Maize Yield ◽  
Sub Saharan Africa ◽  
Inorganic Fertilizer ◽  
Soil Chemical Properties ◽  
Fertilizer Treatment ◽  
Acidic Soils ◽  
Maize Grain Yield ◽  
Maize Grain

In Sub-Saharan Africa (SSA), acidic soil covers 29% of the total area. About 13% of the Kenyan total land area has acidic soils, widely distributed in croplands of the central and western Kenyan regions. The high soil acidity, coupled with soil nutrient depletion, negatively affects crop productivity in the region. We conducted an on-farm experiment to determine the effect of lime, manure, and phosphatic fertilizer application, either solely or combined, on soil chemical properties, maize yield, and profitability in acidic soils of Tharaka Nithi County, Kenya. The treatments were different rates of manure, lime, and P fertilizer. The experiment was designed as a randomized complete block design replicated ten times in farmer’s fields. Soil sampling was done at a depth of 0-20 cm prior to the start of the experiment, after crop harvest of SR2016 and LR2017 seasons. The samples were analyzed in the laboratory following standard methods. Results showed that lime significantly increased soil pH by 10.6% during the SR2016 and by 17.7% during the LR2017. Similarly, treatments with lime reduced exchangeable acidity and increased soil available P. Treatments with inorganic fertilizers had significantly higher maize grain yield in comparison with treatments with the sole application of lime, manure, and lime + manure. Lime + fertilizer + manure treatment gave the highest average maize grain yield (5.1 t ha−1), while control gave the lowest (1.5 t ha−1) during the LR2017 season. Economic returns were low due to the prevailing low rainfall experienced during the study period during the SR2016 season. Lime combined with inorganic fertilizer treatment recorded the highest returns (128.75 USD ha-1) followed by sole inorganic fertilizer (105.94 USD ha-1) during the LR2017 season. The study recommends a combination of both lime and inorganic fertilizer for enhanced maize production and profitability in Tharaka-Nithi County, Kenya.

scholarly journals Relationship between grain yield and blossoming in upland rice lines

2020 ◽  
Vol 1 (1) ◽  
pp. 98
Author(s):  
Monique Carolina Nunes Fernandes ◽  
Douglas Goulart Castro ◽  
Flávia Barbosa Silva Botelho ◽  
Amanda Mendes de Moura ◽  
Laís Moretti Tomé ◽  
...  
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Upland Rice ◽  
Block Design ◽  
Phenotypic Correlation ◽  
Days To Flowering ◽  
Randomized Complete Block Design ◽  
Simultaneous Selection ◽  
Genotype Correlation ◽  
Low Magnitude

For upland rice, it is desired, among many objectives, to obtain highly productive and early genotypes, consequently reducing the risk of establishing a crop regarding climatic adversities. Therefore, this study aimed to verify the correlation between the agronomic traits days to flowering and grain yield of 14 upland rice lines. The experiment was conducted in seven environments, in the 2013/14, 2014/15 and 2015/16 crop years, in a randomized complete block design with three replications. Both the genotypic and phenotypic correlation were significant and positive, whereas the genotype correlation was superior to the phenotype. However, it was noted a low magnitude of the correlation values. It was concluded that a favorable and simultaneous selection is possible for high grain yield and plants with early blossoming cycle in upland rice.

scholarly journals Effect of different doses of Ipil-Ipil (Leucaena leucocephala) (LAM.) de wit. tree green leaf biomass on rice yield and soil chemical properties

2015 ◽  
Vol 2 (3) ◽  
pp. 385-394
Author(s):  
Niloy Paul ◽  
Mohammad Kamrul Hasan ◽  
Md Nasir Uddin Khan
Keyword(s):  
Grain Yield ◽  
Leucaena Leucocephala ◽  
Rice Yield ◽  
Chemical Properties ◽  
Soil Chemical Properties ◽  
Green Leaf ◽  
Leaf Biomass ◽  
Rice Grain ◽  
Total N ◽  
Different Doses

A field experiment was conducted to find out the effect of different doses of ipil-ipil (Leucaena leucocephala ) (Lam.) de Wit. tree green leaf biomass on rice yield and soil chemical properties. Four different treatments such as T0: Recommended fertilizer dose (Urea 195 kg/ha, TSP 50 kg/ha, MOP 142 kg/ha, Gypsum 75 kg/ha and Zinc Sulphate 4 kg/ha), T1: 5 t/ha, T2: 7.5 t/ha, and T3: 10 t/ha ipil-ipil tree green leaf was used in this study in a Randomized complete block design with three replications. The results showed that the treatment T3 was performed better than recommended fertilizer dose in case all yield contributing characters of rice except grain yield. The highest (5.29 t/ha) rice grain yield was obtained in recommended fertilizer dose followed by 10 t/ha, 7.5 t/ha and 5 t/ha ipil-ipil tree green leaf biomass amendment having 4.80, 3.16 and 2.36 t/ha respectively. The highest grain yield that was obtained from recommended fertilizer dose was 10.21% higher compared to the highest dose (10 t/ha) of ipil-ipil tree green leaf biomass. It was mentioned that among the different doses of ipil-ipil tree green leaf biomass 10 t/ha performed the best over others. The ipil-ipil tree green leaf biomass was also significantly influenced on some essential nutrient status which is very important for rice production. The highest amount of total N, available P, exchangeable K and available S were found in the treatment T3 and the lowest in the treatment T1. Therefore, it can be concluded that the ipil-ipil tree leaf has beneficial effects and could be combined with inorganic fertilizer for sustainable crop yield and maintaining soil fertility.Res. Agric., Livest. Fish.2(3): 385-394, December 2015

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