scholarly journals Yield performance of some maize varieties as influenced by irrigation management at different growth stages

2019 ◽  
Vol 6 (1) ◽  
pp. 57-67
Author(s):  
Md Shahriar Kobir ◽  
Md Rashedur Rahman ◽  
AKM Mominul Islam ◽  
Suchana Paul ◽  
Md Monirul Islam ◽  
...  
Keyword(s):  
Irrigation Management ◽  
Grain Filling ◽  
Growth Stages ◽  
Yield Performance ◽  
Factor B ◽  
Leaf Stage ◽  
Filling Stage ◽  
Maize Varieties ◽  
Grain Filling Stage ◽  
Different Growth Stages

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during the period from December 2017 to April 2018 to study the yield performance of some maize varieties as influenced by irrigation management at different growth stages. The experiment was laid out in a split plot design with three replications where factor (A) irrigation stages were allocated in main plots and factor (B) varieties were distributed in sub plots. In factor A five irrigation management viz. I0 = (No irrigation), I1= (Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage), I2= (Four leaf stage+ eight leaf stage + tasselling stage), I3= (Eight leaf stage + tasselling stage +grain filling stage), I4=(Four leaf stage + tasselling stage+ grain filling stage), I5=(Four leaf stage+ eight leaf stage+ grain filling stage) and in factor B three varieties viz. V1= (BARI hybrid vutta-9), V2= (BARI hybrid vutta-13), V3= (pacific-559) were included as treatments in the experiment. Data were collected on yield and yield contributing characters. The highest grain yield (5.88 t/ha) was obtained with the water management treatment I1(Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage) which is statistically similar to treatment I4(Four leaf stage + tasselling stage+ grain filling stage) and highest grain yield (5.87 t/ha) obtained due to the varietal factor V3 (pacific-559). Interaction between I1 irrigation treatment and V3 varietal factor (I1V3) were found to be the best combination which is statistically similar to I4V3 interaction. As I4 treatment and I4V3 interaction are cost effective than I1 treatment and I1V3 interaction, respectively, irrigation should be given at four leaf stage, tasselling stage, and grain filling stage with variety pacific-559 for better performance in maize production. Res. Agric., Livest. Fish.6(1): 57-67, April 2019

scholarly journals DRY MATTER PARTITIONING OF MAIZE PLANT AS AFFECTED BY WATER MANAGEMENT AT DIFFERENT GROWTH STAGES

2020 ◽  
Vol 1 (1) ◽  
pp. 31-36
Author(s):  
Md. Shahriar Kobir ◽  
Md. Rashedur Rahman ◽  
A.K.M. Mominul Islam
Keyword(s):  
Water Management ◽  
Dry Matter ◽  
Grain Filling ◽  
Maize Plant ◽  
Growth Stages ◽  
Dry Matter Partitioning ◽  
Leaf Stage ◽  
Filling Stage ◽  
Grain Filling Stage ◽  
Different Growth Stages

The research work was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, in the fiscal year 2017-2018 to study the dry matter partitioning of maize plant affected by water management at different growth stages. The research was conducted in a split plot design with three replications where irrigation stages were allocated in main plots and varieties were allocated in sub plots. There were five irrigation management treatments viz. I0 – (No irrigation), I1 – (Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage), I2 – (Four leaf stage+ eight leaf stage + tasselling stage), I3- (Eight leaf stage + tasselling stage +grain filling stage), I4 -(Four leaf stage + tasselling stage+ grain filling stage), I5 -(Four leaf stage+ eight leaf stage+ grain filling stage) and there were three varieties viz. V1 – (BARI hybrid vutta-9), V2 – (BARI hybrid vutta-13), V3 – (pacific-559) in the experiment. The highest dry matter by root, culm, leaf, tassel and cob as well as by total dry matter and seed yield was obtained with the water management treatment I1(Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage) which is statistically similar to treatment I4(Four leaf stage + tasselling stage+ grain filling stage) and the highest dry matter by root, culm, leaf, tassel and cob as well as total dry matter and seed yieldwas obtained due to the varietal factor V3 (pacific-559). Interaction between I1 irrigation treatment and V3 varietal factor (I1V3) were found to be the best combination for maximum dry matter production which is statistically similar to I4V3 interaction. As I4 treatment and I4V3 interaction are cost effective than I1 treatment and I1V3 interaction, respectively, irrigation should be given at Four leaf stage, tasselling stage, and grain filling stage with variety pacific-559 for maximum dry matter as well as for maximum grain production in maize

scholarly journals Quantitative Response of Maize Vcmax25 to Persistent Drought Stress at Different Growth Stages

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1971
Author(s):  
Xingyang Song ◽  
Guangsheng Zhou ◽  
Qijin He ◽  
Huailin Zhou
Keyword(s):  
Drought Stress ◽  
Early Warning Systems ◽  
Growth And Yield ◽  
Leaf Water Content ◽  
Growth Stages ◽  
Leaf Stage ◽  
Maximum Value ◽  
Maize Varieties ◽  
Persistent Drought ◽  
Different Growth Stages

Drought stress has adverse effects on crop growth and yield, and its identification and monitoring play vital roles in precision crop water management. Accurately evaluating the effect of drought stress on crop photosynthetic capacity can provide a basis for decisions related to crop drought stress identification and monitoring as well as drought stress resistance and avoidance. In this study, the effects of different degrees of persistent drought in different growth stages (3rd leaf stage, 7th leaf stage and jointing stage) on the maximum carboxylation rate at a reference temperature of 25 °C (Vcmax25) of the first fully expanded leaf and its relationship to the leaf water content (LWC) were studied in a field experiment from 2013 to 2015. The results indicated that the LWC decreased continuously as drought stress continued and that the LWC decreased faster in the treatment with more irrigation. Vcmax25 showed a decreasing trend as the drought progressed but had no clear relationship to the growth stage in which the persistent drought occurred. Vcmax25 showed a significantly parabolic relationship (R2 = 0.701, p < 0.001) with the LWC, but the different degrees of persistent drought stress occurring in different growth stages had no distinct effect on the LWC values when Vcmax25 reached its maximum value or zero. The findings of this study also suggested that the LWC was 82.5 ± 0.5% when Vcmax25 reached its maximum value (42.6 ± 3.6 μmol m−2 s−1) and 67.6 ± 1.2% (extreme drought) when Vcmax25 reached zero. These findings will help to improve crop drought management and will be an important reference for crop drought identification, classification and monitoring as well as for the development of drought monitoring and early warning systems for other crops or maize varieties.

scholarly journals PHYSIOLOGICAL AND YIELD RESPONSE OF SOME UPLAND RICE VARIETIES TO RE-WATERING AFTER IMPOSED SOIL MOISTURE STRESS

2016 ◽  
Vol 15 (1) ◽  
pp. 93-111
Author(s):  
O. S. SAKARIYAWO ◽  
S. O. OLAGUNJU ◽  
M. O. ATAYESE ◽  
K. A. OKELEYE ◽  
P. A.S., SOREMI ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Upland Rice ◽  
Grain Filling ◽  
Moisture Stress ◽  
Yield Response ◽  
Growth Stages ◽  
Soil Moisture Stress ◽  
Rice Varieties ◽  
Filling Stage ◽  
Grain Filling Stage

A pot experiment was conducted in the Screen house of Federal University of Agriculture, Abeokuta, October, 2011 (late dry season) to study drought recovery ability of 13 upland rice varieties exposed to soil moisture stress (20 days) at three growth stages (vegetative, reproductive and grain filling stage). The experiment was in completely randomized design, with three replicates. Under moisture stress significantly higher growth recovery, more erect canopy and flatter leaf surface were obtained in all the rice varieties at vegetative growth stage than other growth stages with increasing duration of re-watering. Under stress condition NERICA 4 maintained a significantly higher leaf area (27.50 cm2 and 40.18 cm2), plant height (53.45 cm and 67.62 cm) and number of tillers (1.67 and 1.67), but with a depressed number of leaf, slanted leaf posture and curved leaf especially during the later stage of its growth (Reproductive and grain filling stage respectively). It could be concluded that NERICA 4 had higher recovery ability than other rice varieties in drought prone upland ecology.

scholarly journals Single Irrigation Enhanced Water Productivity of Rainfed Wheat under Mediterranean Environment

2019 ◽  
Vol 11 (2) ◽  
pp. 277-282
Author(s):  
Abolfazl NASSERI ◽  
Hossein Ali FALLAHI ◽  
Vahid REZAVERDINEJAD
Keyword(s):  
Grain Yield ◽  
Water Productivity ◽  
Irrigation Management ◽  
Grain Filling ◽  
Mediterranean Environment ◽  
Optimum Yield ◽  
Filling Stage ◽  
Effect On Yield ◽  
Rainfed Wheat ◽  
Grain Filling Stage

Single or double irrigations of wheat are necessary to obtain optimum yield in a humid region with insufficient rainfall for agricultural production. Therefore, the hereby study was conducted with the aim of analysis of water productivity under rainfed and (single or double) irrigated conditions in a Mediterranean environment during 11 cropping years. There were investigated four treatments for irrigation management of wheat viz. rainfed without irrigation (T0), single irrigation at the flowering stage (T1), single irrigation at the grain filling stage (T2) and double irrigation at the flowering and grain filling stages (T3). Results revealed that the highest water productivity and optimum yield were acquired with single irrigation at the grain filling stage. This scheme caused an increase of 20% in grain yield relative to yield from rainfed condition. Rainfall, grain yield and water productivity of rainfed wheat were analyzed over 11 years and averaged 3,614 m3 ha-1, 1,970 kg ha-1 and 0.63 kg m-3, respectively. Results also showed that single or double irrigation had a high compensation effect on yield loss from water stress. Irrigation water productivity (1.31 kg m-3), water productivity (0.68 kg m-3) and irrigation ratio (2.2) indices determined for the 11 years. Water productivity of rainfed wheat by single irrigation at grain filling stage increased as 10% during 11 years.

scholarly journals Effect of Nitrogen Scheduling and Cultivars on Yield Attributes and Yields of Sorghum (Sorghum bicolor L.)

2020 ◽  
Author(s):  
Pappu Khatik ◽  
J. X. Massey ◽  
Shrimohan Meena
Keyword(s):  
Grain Yield ◽  
Nitrogen Content ◽  
Block Design ◽  
Foliar Spray ◽  
Grain Filling ◽  
Available Nitrogen ◽  
Yield Attributes ◽  
Leaf Stage ◽  
Filling Stage ◽  
Grain Filling Stage

A field experiment was conducted during kharif season of 2013 at Udaipur (Rajasthan) to find out the effect of nitrogen scheduling and cultivars on yield attributes, yield and soil fertility status after harvest of sorghum. Treatment consisted two cultivars (V1: CSH 16 and V2: CSV 20) and five nitrogen schedules (N1: 50% at sowing as basal + 50% at 30 DAS, N2: 50% at sowing as basal + 25% at 30 DAS + 25% at boot leaf stage, N3: 25% at sowing as basal + 50% at 30 DAS + 25% at boot leaf stage, N4: 25% at sowing as basal + 50% at 30 DAS + 15% at boot leaf stage + 10% at grain filling stage, N5: 25% at sowing as basal + 45% at 30 DAS + 5% foliar spray at 45 DAS + 15 % at boot leaf stage + 10% at grain filling stage) were assigned in a factorial randomized block design. The results revealed that the cultivar CSH 16 recorded significantly higher number of grains per panicle, 1000 grain weight, grain yield (1521 kg/ha), harvest index (13.17) and nitrogen content in plant, whereas significantly higher number of primaries per panicle, stover yield (11141 kg/ha) and available nitrogen in soil were recorded in CSV 20. Application of nitrogen in N2 schedule (50% at sowing as basal + 25% at 30 DAS + 25% at boot-leaf stage) had marked influence on yield attributes, yield and nitrogen content in plant when compared to rest of the nitrogen schedules. Therefore, it was concluded that significantly higher grain yield was recorded in cultivar CSH 16 and N2 schedule of nitrogen application from sorghum.

scholarly journals Conjunctive Use of Saline and Fresh Water for Irrigating Wheat (Triticum aestivum L.) at Different Growth Stages

2013 ◽  
Vol 11 (1) ◽  
pp. 15-23 ◽  
Author(s):  
MA Mojid ◽  
ABM Zahid Hossain
Keyword(s):  
Triticum Aestivum ◽  
Fresh Water ◽  
Irrigation Water ◽  
Saline Water ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Growth Stages ◽  
Irrigation Water Salinity ◽  
Grain Filling Stage ◽  
Different Growth Stages

An experiment was conducted at the Bangladesh Agricultural University, Mymensingh during 2008– 2009 and 2009–2010 to investigate the impacts of irrigation by saline water (7 dS m-1) at different growth stages of wheat (Triticum aestivum L.). Irrigations at crown root initiation (CRI) (T1) or booting (T2) or flowering (T3) or grain filling (T4) stage by saline water but at other growth stages by fresh water, and irrigation at all growth stages by fresh water (T5, control) were applied. Wheat was cultivated in two consecutive years (2008 – 2010) under four irrigations and with recommended fertilizer doses. Irrigation water having salinity of 7 dS m-1 did not significantly influence plant height, spike density, spikelets per spike, 1000-grain weight, grain yield, biomass yield and harvest index. The observed diminutive variations among the treatments reflected only non harmful impacts of salinity. Irrigation water salinity, however, significantly reduced spike length and grains per spike in most cases in the first year only. Treatment T4 producing, on an average over two years, the lowest grain yield (30% less compared to T5), grains per spike, spike length and spikelets per spike revealed that the grain filling stage of wheat was the most sensitive to irrigation water salinity. Although application of one of four irrigations by water of salinity 7 dS m-1 did not impart significant effect on wheat production, it was beneficial to avoid such irrigation at the grain filling stage. DOI: http://dx.doi.org/10.3329/agric.v11i1.15237 The Agriculturists 2013; 11(1) 15-23

Effect of Temperature during Grain Filling Stage on Endosperm Structure and Apperance Quality of Aromatic Rice

2012 ◽  
Vol 460 ◽  
pp. 286-289 ◽  
Author(s):  
Zhen Jiang Xu ◽  
Li Zhong Xiao ◽  
Hong Liu ◽  
Yong Hao Ren ◽  
Zhi Lin Li
Keyword(s):  
Grain Filling ◽  
Effect Of Temperature ◽  
Rice Grain ◽  
Aromatic Rice ◽  
Starch Granules ◽  
Filling Stage ◽  
Appearance Quality ◽  
Endosperm Structure ◽  
Grain Filling Stage

Based on the experiment of two inbred aromatic rice varieties and one hybrid aromatic rice line treated under four different temperatures( daymean temperature 21°C, 23°C, 26°C and 30°C respectively) during grain filling stage in phytotrons, the shape and arrangement of endosperm starch granules in rice grain transection were observed by scanning electron microscope and the related characteristics of rice grain qualities of chalky percent and chalkiness were analyzed at the same time. The results showed that under the lower temperature( daymean temperature21°C and 23°C), many large compound starch granules with clear angulars packed together regularly without significant natural gaps bewteen starch granules in the tansectional endosperm. However, with the increase of temperature, starch granules in the transectional endosperm were changed from regularly shaped and closely and orderly arranged to various shaped and chaoticly arranged with obvious natural gaps between starch granules, which was closely consistent with the poorer appearance quality under the higher temperature, which indicated that the endosperm structure is closely related with appearance quality of aromatic rice.

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