scholarly journals Influence of seedling age on growth, productivity and heat use efficiency of rice genotypes in North West India

2021 ◽  
Vol 23 (1) ◽  
pp. 30-37
Author(s):  
BUTA SINGH DHILLON ◽  
GURPREET KAUR ◽  
G.S. MANGAT ◽  
PRABHJYOT-KAUR
Keyword(s):  
Energy Utilization ◽  
Dry Matter Partitioning ◽  
Area Index ◽  
Yield Attributes ◽  
Straw Yield ◽  
Seedling Age ◽  
North West ◽  
Spad Value ◽  
Use Efficiency ◽  
Rice Genotypes

An experiment was conducted at Punjab Agricultural University, Ludhiana, India during kharif 2017 and 2018 to determine the effect of seedling age on growth, phenology and thermal energy utilization by different rice genotypes. The field experiment was laid–out in factorial RCBD design keeping three seedling age (25, 35, 45 days) and four rice genotypes (PR 121, PR 122,PR 124, PR 126) with three replicates. The prevalence of dry weather conditions especially during September month of 2017, which coincides with graingrowth phase was congenial for rice crop and was reflected in the yield and yield attributes. There was consistent decline in grain and straw yield of rice with increase in seedling age due to reduced leaf area index (LAI), dry matter partitioning to grain/culm and SPAD value. This may be due to prevalence of higher range of minimum temperature resulting into more respiratory losses and thereby leading to lower heat use efficiency. Among genotypes, PR 126 was found to be most heat use efficient owing to its shorter duration (93.9 days), where as PR 121 and PR 122 recorded the highest grain and straw yield due to higher accumulation of growing degree and more congenial temperature leading to more number of panicles m-2 along with the bold grains. It was also observed that increasing seedling age beyond 25 days caused sharp decline in grain and straw yield of PR 124 and PR 126 through effect on panicles m-2,SPAD value and AGDD; while PR 121 and PR 122 gave similar yield when transplanted using 25 to 45 days older seedlings. Harvest index did not differ due to various treatments.

Yield and nitrogen use efficiency of selected dry-direct seeded rice genotypes in North-West India

2018 ◽  
Vol 55 (4) ◽  
pp. 639
Author(s):  
Rupinder Kaur ◽  
Sandeep Sharma ◽  
Seema Bedi ◽  
Gulshan Mahajan
Keyword(s):  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
North West ◽  
Direct Seeded ◽  
Use Efficiency ◽  
Rice Genotypes

scholarly journals Water stress modifies canopy light environment and qualitative and quantitative yield components in two soybean varieties

2021 ◽  
Author(s):  
Angela Anda ◽  
Brigitta Simon ◽  
Gábor Soós ◽  
Jaime A. Teixeira da Silva ◽  
László Menyhárt
Keyword(s):  
Water Stress ◽  
Water Supply ◽  
Hierarchical Regression ◽  
Sowing Time ◽  
Area Index ◽  
Yield Attributes ◽  
Qualitative And Quantitative ◽  
Radiation Properties ◽  
Use Efficiency ◽  
Radiation Use

AbstractThe influence of three levels of water supply (unlimited (WW); water stress during flowering (RO); rainfed (P)) on radiation properties and yield of two soybean varieties (Sinara, Sin; Sigalia, Sig) were evaluated. Sin is considered to be tolerant to water stress. The effect of leaf area index, year, variety, and meteorological variables on evapotranspiration (ET) was analysed by hierarchical regression. This study attempted to identify how water supply affects the crop–light relationship between photosynthetically active radiation (PAR) transmission and radiation use efficiency (RUE), which were involved in qualitative and quantitative traits related to soybean production (biomass and yield attributes: seed yield, 1000-grain weight, oil and protein content). Unstandardized coefficients of air temperature (Ta) showed that a 1 °C increase in daily mean Ta induced a higher ET, on average 0.16 mm day−1. Soil moisture strongly affected sowing time. When averaged across three seasons at flowering, 97.7, 95.1 and 97.3% of incoming PAR were intercepted by the canopies of plants in WW, RO and P, respectively. The average extinction coefficient (k) and RUE pooled across both varieties were 0.42 and 1.32 g MJ PAR−1 for WW, and 0.46 and 0.98 g MJ PAR−1 for RO, respectively, compared with 0.44 and 1.15 g MJ PAR−1 for P. As expected, water treatment significantly affected all yield traits: RO decreased yield whereas WW increased yield compared to P. Practically, both varieties are suitable for cultivation under water stress during flowering but Sin showed greater yield under unlimited watering and rainfed conditions.

scholarly journals Evaluation of Yield and Yield Attributes in Various Rice Genotypes under Different Nitrogen Levels

2019 ◽  
pp. 1-11
Author(s):  
K. Sivasabari ◽  
S. Jothimani
Keyword(s):  
Plant Height ◽  
Harvest Index ◽  
Recommended Dose ◽  
Research Station ◽  
Panicle Length ◽  
Yield Attributes ◽  
Low Level ◽  
Nitrogen Levels ◽  
Use Efficiency ◽  
Rice Genotypes

The experiment was conducted during 2017, Pishanam season at Rice Research Station, Ambasamudram with the objective to screen the efficient and responsive rice genotypes based on nitrogen use efficiency and yield and yield attributes of different genotypes by N levels with 32 rice genotypes as main plot treatments and four nitrogen levels N0 (control), N1 (50% recommended dose of N ha-1), N2 (100% recommended dose of N ha-1) and N3 (150% recommended dose of N ha-1) as subplot treatments. The experimental results showed that, the highest grain and straw yields were recorded at N3 (180 kg ha-1) by the most of the rice genotypes, except the AS 12051, ACK 14004, CB08702, CB 13539 and PM 12009 which were not responded genotypes for higher dose of (180 kg ha-1) nitrogen. In the genotypes ASD 16, ADT 43, ADT 45, CO 51, MDU 5, CB 14508, CB 14533, TR 0927, TR 13069 and TM 12061 the AE was increasing with increasing level of nitrogen, other genotypes showed decreasing trend with increasing level of nitrogen levels. The genotypes viz., ASD16, ADT39, ADT45, TPS 5, AD09206, CB06803, ACK14001, TM10085, TM12007, PM12009 and EC725224 are under Efficient and responsive (ER) category which gives average yield at low level and high N use efficiency. The plant height, productive tillers, total grains, harvest index, panicle length and 1000 grain weights given verified results among the genotypes due to genetic characters. Among the N levels the plant height, panicle length, productive tillers per hill and total grains showed highest in 180 kg N ha-1. 1000 grain weight increased at low level of 50% of RDN (21.0) and decreased to 20.8 in N2 and N3 treatments which indicated higher doses of N. N harvest index were decreased with increasing level of N application from 0.70 (N0), 0.65(N1), 0.64 (N2) and 0.63 (N3).

Nutrient uptake, use efficiency and yield of rice as influenced by time of transplanting and nitrogen levels

2019 ◽  
pp. 209-213
Author(s):  
Sunita Devi ◽  
Neetu Sharma ◽  
BC Sharma ◽  
Vikas Sharma ◽  
Guredev Chand ◽  
...  
Keyword(s):  
Block Design ◽  
Growth Yield ◽  
Yield Attributes ◽  
Straw Yield ◽  
Nitrogen Levels ◽  
Net Returns ◽  
Randomized Block Design ◽  
Use Efficiency ◽  
Four Levels ◽  
Different Levels

An experiment was conducted during Kharif, 2016 to investigate the influence of transplanting dates and nitrogen levels on productivity of transplanted fine rice. Experiment was laid out in factorial randomized block design with two transplanting dates (i.e. D1-15th and D2-30th July) as one factor and four levels of nitrogen (i.e. 0, 30, 60 and 90 kg N/ha) as second factor. Time of transplanting did not influence growth, yield attributes and yield. However, among different levels of nitrogen, significantly highest yield and yield attributes were recorded with 60 kg N/ha. Significantly highest straw yield was recorded with 90 kg N/ha. Rice transplanted on 15th July proved to be superior with respect to gross returns (Rs.70337.50/ha), net return (Rs.38259.28/ha) and B: C ratio (1.19) to that of 30th July transplanting. Whereas among nitrogen levels highest gross returns (Rs.79307.50/ha), net returns (Rs.52314.96) and B: C (1.94) ratio were obtained with application of 60 kg N/ha.

scholarly journals Effect of weed species on drought tolerant rice genotypes at Sundarbazar, Lamjung, Nepal

2019 ◽  
Vol 4 (1) ◽  
pp. 65-78
Author(s):  
Amit Chaudhary ◽  
Bishnu Bilash Adhikari ◽  
Jiban Shrestha
Keyword(s):  
Grain Yield ◽  
Management Practices ◽  
Growth Traits ◽  
Block Design ◽  
Growth And Yield ◽  
Weed Species ◽  
Yield Attributes ◽  
Straw Yield ◽  
Weed Population ◽  
Rice Genotypes

Abstract Weeds compete with rice for water, nutrients, space and light. The effect of weeds on productivity of rice genotypes were studied at research field of Institute of Agriculture and Animal Science, Lamjung Campus, Lamjung, Nepal in 2016. Eight rice genotypes (IR-87684- 18-1-2-3, IR-83388-3-3-140-4, IR-8839-39-1-6-4, IR-87759-7- 1-2-3, IR-88966-22-1-1-1, IR-88839-3-1-2-2, IR-88869-2-2-2-2, and Sukhadhan-3) and two weed management practices (Weeded condition and non weeded condition) were studied in randomized complete block design (RCBD) with three replications. Results showed that weeding operation significantly increased the growth traits and final yield of rice genotypes. Non-significant results among tested genotypes were obtained for grain yield and straw yield however the maximum grain yield (3.68 t ha-1) and straw yield (5.99 t ha-1) were found in IR-88839- 39-1-6-4 which might be due to highest test grain weight (30.64 g), tallest plant height (105.7m) and lower sterility percentage (21.84%). Similarly, the relative grain yield loss due to weed infestation was 41.8%. The highest grain yield (3.99 t ha-1) and straw yield (6.90 t ha-1) was found in weeded plots compared to non-weeded plots (2.321 t ha-1 and 6.43 t ha-1, respectively). Among weed species, Rotala indica was found most dominant (1091 m-2) and proportion 18%) followed by Eriocaulon cinereum (245.83 m-2 and 12%). Interaction effect between variety and weed population showed non-significant results for all growth and yield attributes. The plots having highest number of weed population showed greater loss of rice yield. Thus this study suggests that weeding should be carried out to achieve higher rice production.

scholarly journals Growth response and water production functions of wheat (Triticumaestivum L.) under abiotic stresses in central and south-western Punjab

MAUSAM ◽  
2021 ◽  
Vol 72 (4) ◽  
pp. 887-896
Author(s):  
HARKANWALJOT SINGH ◽  
P. K. KINGRA ◽  
R. K. PAL ◽  
SOMPAL SINGH
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Abiotic Stresses ◽  
Dry Matter ◽  
Dry Matter Accumulation ◽  
Area Index ◽  
Yield Attributes ◽  
Thermal Environments ◽  
Use Efficiency ◽  
Dough Stage

A field experiment was conducted in two agroclimatic zones of the Punjab (viz., Ludhiana representing central plain zone and Bathinda representing south-western arid zone) to study the growth, yield and water use efficiency of wheat under abiotic stresses. The wheat variety HD-2967 was evaluated under five thermal environments (D1 - 20th October, D2 - 05th November, D3 - 20th November, D4 - 5th December and D5 - 20th December) to expose the crop to different thermal environments and two nitrogen levels (N1- Recommended dose of N and N2 - 25 per cent less than recommended N) in main plots and two irrigation levels (I1-Optimal (recommended) irrigation (Irrigation at CRI, Jointing, Flowering and Soft dough stage) and I2-Sub-optimal irrigation (one irrigation less than recommended) (Irrigation at CRI, Flag leaf emergence and Soft dough stage) in sub-plots during two consecutive rabi seasons of 2017-18 and 2018-19. At 45 DAS; number of tillers/m2, plant height, dry matter accumulation and leaf area index in 20th October sown crop was significantly higher than other dates of sowing at both the stations during both the years. But at the time of harvesting, tiller count and plant height was highest under 5th November sown crop, whereas dry matter accumulation and leaf area index was significantly highest under 20th October sown crop. Yield and yield attributes were significantly highest under 5th November and significantly lowest under 20th December sown crop. Wheat crop exhibited significantly highest WUE w.r.t. straw and grain yield in 5th November sowing (D2) which was at par with that under 20th October sowing and significantly lowest water use efficiency was observed under 20th December (D5) sown crop at both the locations during both crop seasons. Recommended dose of nitrogen and optimal irrigation also produced significantly higher WUE at both the locations during both the years. The study concluded that earlier sowing of wheat along with recommended nitrogen and optimal irrigation can significantly improve growth and yield attributes as well as water use efficiency in both the agroclimatic regions.

scholarly journals Optimizing Grain Yield and Water Use Efficiency Based on the Relationship between Leaf Area Index and Evapotranspiration

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 313
Author(s):  
Guoqiang Zhang ◽  
Bo Ming ◽  
Dongping Shen ◽  
Ruizhi Xie ◽  
Peng Hou ◽  
...  
Keyword(s):  
Grain Yield ◽  
Water Use Efficiency ◽  
Leaf Area Index ◽  
Water Use ◽  
Plant Density ◽  
Maize Yield ◽  
Area Index ◽  
Irrigation Level ◽  
Use Efficiency ◽  
The Relationship

Achieving optimal balance between maize yield and water use efficiency is an important challenge for irrigation maize production in arid areas. In this study, we conducted an experiment in Xinjiang China in 2016 and 2017 to quantify the response of maize yield and water use to plant density and irrigation schedules. The treatments included four irrigation levels: 360 (W1), 480 (W2), 600 (W3), and 720 mm (W4), and five plant densities: 7.5 (D1), 9.0 (D2), 10.5 (D3), 12.0 (D4), and 13.5 plants m−2 (D5). The results showed that increasing the plant density and the irrigation level could both significantly increase the leaf area index (LAI). However, LAI expansion significantly increased evapotranspiration (ETa) under irrigation. The combination of irrigation level 600 mm (W3) and plant density 12.0 plants m−2 (D4) produced the highest maize yield (21.0–21.2 t ha−1), ETa (784.1–797.8 mm), and water use efficiency (WUE) (2.64–2.70 kg m−3), with an LAI of 8.5–8.7 at the silking stage. The relationship between LAI and grain yield and evapotranspiration were quantified, and, based on this, the relationship between water use and maize productivity was analyzed. Moreover, the optimal LAI was established to determine the reasonable irrigation level and coordinate the relationship between the increase in grain yield and the decrease in water use efficiency.

Dry matter partitioning to leaves differentiates African and Asian rice genotypes exposed to elevated CO 2

2020 ◽  
Vol 207 (1) ◽  
pp. 120-127
Author(s):  
Yusuke Masuya ◽  
Etsushi Kumagai ◽  
Maya Matsunami ◽  
Hiroyuki Shimono
Keyword(s):  
Dry Matter ◽  
Dry Matter Partitioning ◽  
Asian Rice ◽  
Rice Genotypes

Contrasting yield formation characteristics in two super-rice hybrids that differ in growth duration

2021 ◽  
pp. 1-10
Author(s):  
Min Huang ◽  
Zui Tao ◽  
Tao Lei ◽  
Fangbo Cao ◽  
Jiana Chen ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Biomass Production ◽  
Field Experiments ◽  
Crop Improvement ◽  
Total Biomass ◽  
Growth Duration ◽  
Area Index ◽  
Rice Hybrid ◽  
Use Efficiency ◽  
Yield Formation

Summary The development of high-yielding, short-duration super-rice hybrids is important for ensuring food security in China where multiple cropping is widely practiced and large-scale farming has gradually emerged. In this study, field experiments were conducted over 3 years to identify the yield formation characteristics in the shorter-duration (∼120 days) super-rice hybrid ‘Guiliangyou 2’ (G2) by comparing it with the longer-duration (∼130 days) super-rice hybrid ‘Y-liangyou 1’ (Y1). The results showed that G2 had a shorter pre-heading growth duration and consequently a shorter total growth duration compared to Y1. Compared to Y1, G2 had lower total biomass production that resulted from lower daily solar radiation, apparent radiation use efficiency (RUE), crop growth rate (CGR), and biomass production during the pre-heading period, but the grain yield was not significantly lower than that of Y1 because it was compensated for by the higher harvest index that resulted from slower leaf senescence (i.e., slower decline in leaf area index during the post-heading period) and higher RUE, CGR, and biomass production during the post-heading period. Our findings suggest that it is feasible to reduce the dependence of yield formation on growth duration to a certain extent in rice by increasing the use efficiency of solar radiation through crop improvement and also highlight the need for a greater fundamental understanding of the physiological processes involved in the higher use efficiency of solar radiation in super-rice hybrids.

scholarly journals Effect of Organic Manures on Growth, Rhizome Yield and Quality Attributes of Turmeric (Curcuma longa L.)

2012 ◽  
Vol 10 (1) ◽  
pp. 16-22 ◽  
Author(s):  
M. Z. U. Kamal ◽  
M. N. Yousuf
Keyword(s):  
Leaf Area ◽  
Dry Matter ◽  
Curcuma Longa ◽  
Dry Weight ◽  
Fresh Weight ◽  
Area Index ◽  
Yield Attributes ◽  
Organic Manures ◽  
Neem Cake ◽  
Yield And Quality

The investigation was carried out to evaluate the effect of different organic manures on turmeric with reference to vegetative growth, biomass production, rhizome yield and its attributes of turmeric (Curcuma longa L.). Turmeric showed better response to the application of organic manures. Plant with neem cake application had the taller plant (79.30 cm), maximum number of tillers per plant (5.40), leaf number (5.40), leaf area (44.09) leaf area index (0.429), fresh weight of halum ( 190.05g), fresh weight of root (49.13 g), fresh weight of rhizome per plant (256.21 g) and dry weight of halum (15.21g), dry weight of root (7.32 g), dry weight of rhizome per plant (40.35 g), total dry matter yield (6.85 t ha-1) than those received other types of manures. Moreover, yield attributes such as number of mother rhizomes per plant-1 (1.75), more number of primary rhizomes per plant-1 (5.19), secondary rhizomes per plant-1 (18.03) and tertiary rhizomes per plant (7.69) were also highly accelerated by neem cake application. Similarly, the same treatment expressed the best in terms of size of mother rhizome (7.69 cm), primary rhizome (21.86 cm) and secondary rhizomes (7.05 cm).All these parameters in cumulative contributed to  produce the highest estimated fresh rhizomes yield & cured rhizomes yield (29.48 t ha-1, 5.59 t ha-1 respectively). The highest curing percentage (20.28) was observed in T3 treatment having mustard cake@ 2.0 t/ha. Thus, organic manure like neem cake was best fitted natural fertilizer for turmeric cultivation.DOI: http://dx.doi.org/10.3329/agric.v10i1.11060The Agriculturists 2012; 10(1): 16-22

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