Influence of split application of nitrogen on foliar N content, photosynthesis, dry matter production and yield in short- and medium-duration rice cultivars

1997 ◽  
pp. 285-294
Author(s):  
C. Vijayalakshmi ◽  
M. Nagarajan
Keyword(s):  
Dry Matter ◽  
Dry Matter Production ◽  
Rice Cultivars ◽  
Split Application ◽  
N Content ◽  
Foliar N ◽  
Matter Production

scholarly journals Dry Matter Production and Nitrogen Absorption of Japonica-Indica Hybrid Rice Cultivars Grown under Upland Conditions.

2002 ◽  
Vol 71 (1) ◽  
pp. 28-35 ◽  
Author(s):  
Yoshiharu WADA ◽  
San-Iku YUN ◽  
Hiroki SASAKI ◽  
Tadanobu MAEDA ◽  
Kunio MIURA ◽  
...  
Keyword(s):  
Dry Matter ◽  
Hybrid Rice ◽  
Dry Matter Production ◽  
Rice Cultivars ◽  
Nitrogen Absorption ◽  
Matter Production ◽  
Upland Conditions ◽  
Indica Hybrid Rice

scholarly journals Dry Matter Production and Partitioning in Different Plant Parts of Rice Cultivars under Irrigation Regimes and Systems of Cultivation

2021 ◽  
Author(s):  
G.V. Venkataravana Nayaka ◽  
G. Prabhakara Reddy ◽  
R. Mahender Kumar
Keyword(s):  
Dry Matter ◽  
Crop Growth ◽  
Dry Matter Production ◽  
Growth Stages ◽  
Rice Cultivars ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Irrigation Regimes ◽  
Matter Production ◽  
Crop Growth Stages

Background: Growth and yield characteristics of genotypes depend on genetic and environmental factors. Among the different production factors, varietal selection at any location plays an important role. Proper crop management depends on the growth characteristics of various varieties to get maximum benefit from new genetic material. Among the different water- saving irrigation methods in rice, the most widely adopted is alternate wetting and drying (AWD). Many of the rice cultivars vary in their performance under different systems of cultivation.Methods: A field experiment was conducted on a clay loam soil at Indian Institute of Rice Research (IIRR) Rajendranagar, Hyderabad, Telangana during the kharif seasons of 2017 and 2018. to study the “productivity and water use efficiency of rice cultivars under different irrigation regimes and systems of cultivation” The treatments consisted of two irrigation regimes Alternate wetting and drying and Saturation as main plot treatments, three establishment methods System of Rice Intensification (SRI), Drum Seeding (DS) and Normal transplanting (NTP) as sub plot treatments and four Cultivars namely DRR Dhan 42, DRR Dhan 43, MTU-1010 and NLR-34449 as sub-sub plot treatments summing up to 24 treatment combinations laid out in split-split plot design with three replications.Result: At 60, 90 DAS/DAT and harvest significantly dry matter production (DMP) was recorded with DRR Dhan 43 cultivar (607, 4320 and 11548 kg ha-1 respectively in pooled means of both 2017 and 2018) than other cultivars. Whereas MTU-1010 and NLR-34449 recorded on par dry matter production values at all the crop growth stages during both the years of study. However, DRR Dhan 42 produced the lowest dry matter production compared to other genotypes. DRR Dhan 43 recorded higher dry matter accumulation (g m-2) in root, stem and leaves at all the crop growth stages, during both the years of the study over other cultivars. Alternative wetting and drying method of irrigation recorded significantly higher DMP at all the growth stages of rice (60, 90 DAS/DAT and at harvest) except at 30 DAS/DAT during both 2017 and 2018 as compared to saturation. SRI recorded significantly higher DMP as compared to normal transplanting; however, it was comparably at par with drum seeding at all the growth stages.

scholarly journals Effects of nitrogen fertilizer and elevated CO2 on dry matter production and yield of rice cultivars

1970 ◽  
Vol 34 (2) ◽  
pp. 313-322 ◽  
Author(s):  
MA Razzaque ◽  
MM Haque ◽  
MA Hamid ◽  
QA Khaliq ◽  
ARM Solaiman
Keyword(s):  
Elevated Co2 ◽  
Field Condition ◽  
Dry Matter ◽  
Dry Weight ◽  
Dry Matter Production ◽  
Optimum Dose ◽  
Rice Cultivars ◽  
Nitrogen Levels ◽  
Matter Production ◽  
Growing Conditions

A pot experiment was conducted at Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during the year 2003 to find out the dry matter production and yield of rice cultivars under different nitrogen levels and growing conditions. Thirty-day old single seedlings were transplanted in pot and were placed in 3 growing conditions, such as i) Open top chamber (OTC) with elevated CO2 (570 ± 50 ppm), ii) OTC with ambient CO2 (360 ± 50 ppm), and iii) open field condition. The three nitrogen levels used were, i) control, ii) optimum dose, and iii) supra optimum dose. Three rice cultivars used in the experiment were, i) BRRI dhan 39, ii) Khashkani, and iii) Shakkarkhora. Rice yield and dry matter production respond significantly to different environments. Increasing atmospheric CO2 increased grain yield. Stem dry weight, leaf dry weight, leaf sheath dry weight and root dry weight were increased in elevated CO2 than ambient CO2 and field condition. BRRI dhan 39 gave highest yield (50.82 g/plant) at supra optimum N level in elevated CO2. Local variety gave similar result under elevated CO2 in optimum and supra optimum N levels. The lowest yield (15.09 g/plant) was produced by Shakkorkhora in field condition with no nitrogen application. Key Words: Nitrogen; elevated CO2; yield; dry matter.DOI: 10.3329/bjar.v34i2.5804Bangladesh J. Agril. Res. 34(2): 313-322, June 2009

scholarly journals Optical crop sensor for variable-rate nitrogen fertilization in corn: i - plant nutrition and dry matter production

2013 ◽  
Vol 37 (5) ◽  
pp. 1288-1298 ◽  
Author(s):  
Jardes Bragagnolo ◽  
Telmo Jorge Carneiro Amado ◽  
Rodrigo da Silveira Nicoloso ◽  
Joerg Jasper ◽  
Junior Kunz ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Plant Nutrition ◽  
Dry Matter ◽  
Vegetation Index ◽  
N Uptake ◽  
Climatic Conditions ◽  
Dry Matter Production ◽  
Variable Rate ◽  
N Content ◽  
Matter Production

Variable-rate nitrogen fertilization (VRF) based on optical spectrometry sensors of crops is a technological innovation capable of improving the nutrient use efficiency (NUE) and mitigate environmental impacts. However, studies addressing fertilization based on crop sensors are still scarce in Brazilian agriculture. This study aims to evaluate the efficiency of an optical crop sensor to assess the nutritional status of corn and compare VRF with the standard strategy of traditional single-rate N fertilization (TSF) used by farmers. With this purpose, three experiments were conducted at different locations in Southern Brazil, in the growing seasons 2008/09 and 2010/11. The following crop properties were evaluated: above-ground dry matter production, nitrogen (N) content, N uptake, relative chlorophyll content (SPAD) reading, and a vegetation index measured by the optical sensor N-Sensor® ALS. The plants were evaluated in the stages V4, V6, V8, V10, V12 and at corn flowering. The experiments had a completely randomized design at three different sites that were analyzed separately. The vegetation index was directly related to above-ground dry matter production (R² = 0.91; p<0.0001), total N uptake (R² = 0.87; p<0.0001) and SPAD reading (R² = 0.63; p<0.0001) and inversely related to plant N content (R² = 0.53; p<0.0001). The efficiency of VRF for plant nutrition was influenced by the specific climatic conditions of each site. Therefore, the efficiency of the VRF strategy was similar to that of the standard farmer fertilizer strategy at sites 1 and 2. However, at site 3 where the climatic conditions were favorable for corn growth, the use of optical sensors to determine VRF resulted in a 12 % increase in N plant uptake in relation to the standard fertilization, indicating the potential of this technology to improve NUE.

Introduction and management of vetch/barley forage mixtures in the rainfed areas of Pakistan. 3. Residual effects on following cereal crops

1999 ◽  
Vol 50 (1) ◽  
pp. 21 ◽  
Author(s):  
I. A. Qamar ◽  
J. D. H. Keatinge ◽  
Noor Mohammad (dec.) ◽  
Asghar Ali ◽  
M. Ajmal Khan
Keyword(s):  
Dry Matter ◽  
Residual Effects ◽  
Barley Seed ◽  
Dry Matter Production ◽  
Annual Rainfall ◽  
Research Centre ◽  
Harvest Time ◽  
N Content ◽  
Matter Production ◽  
Forage Mixtures

The residual effects of winter-sown forage mixtures grown in the northern rainfed parts of Punjab province and south-eastern North West Frontier Province in Pakistan were examined. Studies were carried out during 1994–97 primarily at the National Agricultural Research Centre (NARC), Islamabad, which has an annual rainfall of around 1000 mm and, secondarily, at a much drier site at the Arid Zone Research Centre (AZRC) at Quetta. Common vetch (V), barley (B), and their mixtures at seed ratios of V75B25, V50B50, and V25B75 were sown and 3 harvest time treatments (pre-flowering, full flowering, and maturity) were imposed. Sorghum, and then wheat, were grown as succeeding crops to monitor the residual effects of the introduction and management of legume forage mixtures. Significant residual effects on the dry matter production and nitrogen (N) content of sorghum (P < 0·01) were observed at both NARC and AZRC following different vetch/barley seed ratio treatments. Sorghum dry matter yield after pure vetch and after the mixture ratio treatment of V75B25 was higher (4·5 t/ha) than after other mixtures and it was lowest after sole barley (2·5 t/ha). The N taken up by the sorghum after pure vetch amounted to 56 kg/ha and after pure barley was 25 kg/ha. Nitrogen yield from the sorghum decreased with increasing amount of barley in the mixture. There were no apparent effects of the previous harvest time treatments imposed on the forages. Differences in dry matter production and N content in wheat following sorghum at NARC were just detectable after different vetch/barley seed ratios. The greatest amount of dry matter (>4 t/ha) with an N content of 29 kg/ha was found following pure vetch and sorghum and the lowest dry matter (3·4 t/ha) and N (23 kg/ha) following pure barley and sorghum. At AZRC, the same trends in sorghum were observed as at NARC but with reduced yields due to the substantially lower and less well distributed rainfall and suboptimal temperatures, which restricted the productivity of the initial crops in the sequence.

Relationship Between Photosynthetic Carbon Exchange Rate, Specific Leaf Mass and Other Leaf Characteristics in Chickpea Genotypes

1996 ◽  
Vol 23 (5) ◽  
pp. 617 ◽  
Author(s):  
JB Mythili ◽  
TVR Nair
Keyword(s):  
Exchange Rate ◽  
Dry Matter ◽  
Unit Area ◽  
Selection Criterion ◽  
Stomatal Resistance ◽  
Dry Matter Production ◽  
N Content ◽  
Specific Leaf Mass ◽  
Matter Production ◽  
Final Harvest

Thirteen chickpea (Cicer arietinum L.) genotypes, raised in the field, were screened for carbon exchange rate (CER), related leaf characters and dry matter production throughout the season. Seasonal pattern of the CER and related characters were similar in all genotypes. CER showed two peaks, one at the late vegetative phase and the other at the peak pod filling phase. Stomatal resistance (rs) and specific leaf mass (SLM) increased in the successively formed leaves while nitrogen concentration tended to decline, especially in later-formed leaves. Nitrogen (N) content per unit area, however, remained relatively constant throughout the season. Significant genotypic variabilities were observed in CER and related characters as well as in total dry matter accumulated at harvest. Seasonal means of CER ranged from 12.5 in HG 1765B to 18.4 μmol CO2 m-2 s-1 in BG 315, SLM from 5.1 in HG 1765 to 6.5 mg dry weight cm-2 in BG 315, rs from 1.31 in BG 315 to 1.92 s cm-1 in Hyb 16-3, leaf N content from 122.6 in HG 1765B to 172.1 mmol m-2 in BG 315 and total dry matter at final harvest from 9.9 in HG 17658 to 34.9 g plant-1 in K4. Seasonal means of CER were positively correlated with SLM, N content per unit area and final harvest dry matter. Stomatal resistance was negatively correlated with CER and final harvest dry matter. The results indicate that although CER is the best selection criterion for higher dry matter production in chickpea, it is possible to use SLM as an indirect selection criterion for CER in this crop. However, such a selection based on SLM involves the risk of elimination of high N-use efficiency genotypes.

Dry matter yield and nitrogen content in Lupinus spp. (Leguminosae) with potential as a green manure

2019 ◽  
Author(s):  
I. Zapata Hernández ◽  
Rodríguez Macías ◽  
P. M. García López ◽  
E. Salcedo Perez ◽  
A. Lara Rivera ◽  
...  
Keyword(s):  
Green Manure ◽  
Dry Matter ◽  
Experimental Period ◽  
Matter Content ◽  
Dry Matter Production ◽  
Dry Matter Content ◽  
N Content ◽  
Total N ◽  
Matter Production ◽  
Whole Plants

The potential of Lupinus exaltatus, L. mexicanus, and L. rotundiflorus foliage as green manure in terms of total dry matter production and nitrogen (N) content was evaluated. This study was conducted from November 2015 to March 2016 in Zapopan Jalisco, México. The experiment was established in a randomized 3×7 block factorial design. Whole plants, leaves and stems were collected at different periods after sowing and analyzed for N and dry matter content. At the start of the experimental period, a slow growth was observed, based on dry matter production; however, at 93 days after sowing, both biomass and total N increased in the aerial part. The lowest and highest N content was found in L. rotundiflorus (1.2 to 4.0%).The highest dry matter and N accumulated in whole plants were found in L. exaltatus at 169 days after sowing with 21,605 and 410.6 kg ha-1, respectively.

scholarly journals Dry Matter Production and Root System Development of Rice Cultivars under Fluctuating Soil Moisture

2000 ◽  
Vol 3 (2) ◽  
pp. 197-207 ◽  
Author(s):  
Dionisio M. Bañoc ◽  
Akira Yamauchi ◽  
Akihiko Kamoshita ◽  
Len J. Wade ◽  
Jose R. Pardales
Keyword(s):  
Soil Moisture ◽  
Root System ◽  
Dry Matter ◽  
System Development ◽  
Dry Matter Production ◽  
Rice Cultivars ◽  
Root System Development ◽  
Matter Production
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