scholarly journals Crecimiento Y Partición De Biomasa De Dos Cultivares De Maní (Arachis hypogaea L.) En Distintas Fechas De Siembra En Río Cuarto, Córdoba (Argentina)

2016 ◽  
Vol 12 (30) ◽  
pp. 334
Author(s):  
Federico D. Morla ◽  
Oscar Giayetto ◽  
Guillermo A. Cerioni ◽  
Elena M. Fernandez
Keyword(s):  
Growth Rate ◽  
Environmental Conditions ◽  
Yield Components ◽  
Cycle Length ◽  
Management Practices ◽  
Sowing Date ◽  
Crop Growth ◽  
Market Quality ◽  
Crop Growth Rate ◽  
Sowing Dates

Crop management practices like the choice of sowing date and of the cultivar modify and affect the environmental conditions of radiation and temperature in which peanut crop grows and develops. The aim of this study was to evaluate the effect that three contrasting sowing dates (SD) had on the growth and partition of biomass of two peanut cultivars of different cycle length; in the peanut-region of Rio Cuarto, Córdoba (Argentina). The experiment was conducted under field circumstances, without restrictions in water, nutrition or sanitary conditions during 2009/10 and 2010/11 growing season in the experimental field of the FAV-UNRC. On a Typical Haplustol soil with a clear light sandy texture. The Granoleico cultivars (runner type with cycle> 155 days) and Utre cultivars (cross runner x Spanish cycle of 130-140 days) were sown in early October, November and December (1st, 2nd and 3rd SD, respectively). During the growth cycle, environmental conditions were recorded, ecophysiological variables of development (phenology, thermal date) and growth (radiation interception, crop growth rate, biomass partitioning factor) of the crop were determined. At harvest, the yield components and market quality were determined, and the conditions to which the crop was exposed were analyzed. The phenological stages of peanut occurred in different environmental regimen due to variations in cycle length of the cultivars, sowing dates and the interaction between these variables. During the early SD, the duration of the cycle was longer, obtaining a greater amount of radiation as compared to the other SD. Both parameters, duration of the cycle and intercepted radiation (IPAR), decreased with late sowing. By delaying the SD, the crop growth rate (CGR) is greater during the initial periods of the crop cycle; an anticipation in the moment of maximum CGR can be seen, changes that occur in response to increased temperature and incident radiation (PAR), reflected in the pattern of biomass production and partition to the different plant organs. The combination of the SD and the length cycle of the cultivars affected the location of the critical period of definition of the yield components and the amount of radiation obtained by the crop. Particularly, the weight of ripe pod and grains was affected, which decreased by delaying the SD, with similar behavior in both cultivars and years of study. As a result, the pod yield and market quality is reduced with the delay of sowing date in both cultivars.

Study of physiological growth indices of chickpea in chickpea (Cicer arietinum) + mustard (Brassica juncea) intercropping system under different weed management practices

2016 ◽  
Author(s):  
Ranjeet Kour ◽  
B. C. Sharma ◽  
Anil Kumar ◽  
Paramjeet Kour ◽  
Brij Nandan
Keyword(s):  
Growth Rate ◽  
Weed Management ◽  
Management Practices ◽  
Crop Growth ◽  
Net Assimilation Rate ◽  
Assimilation Rate ◽  
Growth Indices ◽  
Replacement Series ◽  
Crop Growth Rate ◽  
Net Assimilation

The field experiments were carried out during rabi season of 2009-10 and 2010-11 at the Research Farm of Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha to assess the physiological growth indices in chickpea+mustard intercropping system under different weed management practices. The significant superiority of replacement series treatment for leaf area index of chickpea over additive series treatment was noticed. The crop of sole chickpea was followed by replacement and additive series treatments in recording highest dry matter, crop growth rate and net assimilation rate values. Sole stand of chickpea recorded numerically higher relative growth rate (RGR) followed by replacement and additive series treatments. Weed free treatment recorded numerically the highest crop growth rate (CGR) and net assimilation rate (NAR) of chickpea at all the stages of observation. Sole chickpea produced higher yield as compared to chickpea+mustard when grown in additive and replacement series in the respective order.

scholarly journals Growth analysis in relation to sowing dates in four varieties of wheat: a functional approach

1970 ◽  
Vol 2 (2) ◽  
pp. 17-25
Author(s):  
SA Haider
Keyword(s):  
Growth Rate ◽  
Leaf Growth ◽  
Weight Ratio ◽  
Sowing Date ◽  
Functional Approach ◽  
Crop Growth Rate ◽  
Stages Of Growth ◽  
Key Words Wheat ◽  
Sowing Dates ◽  
Net Assimilation

Effect of three different sowing dates on growth of four varieties of wheat was analyzed using functional techniques. Crop growth rate (CGR), relative leaf growth rate (RLGR) and specific leaf area (SLA) were higher in the early sown plants compared to late sown plants. Net assimilation rate (NAR) in all the varieties increased slowly at the early stages of growth while it increased sharply at the later stages with fluctuations in most cases. The declining tendency was found in SLA at the middle stage of growth except variety C 306. Higher values of CGR were found in the early sown Protiva, leaf weight ratio (LWR) in the late sown C 306 and early sown Opata, RLGR in the early sown Opata and C 306, SLA in the late sown Opata and Protiva and NAR in all the four varieties when they were sown late. Key words: Wheat; sowing date; growth; functional technique DOI: 10.3329/jles.v2i2.7492 J. Life Earth Sci., Vol. 2(2) 17-25, 2007  

Study of physiological growth indices of mustard in chickpea (Cicer arietinum) + mustard (Brassica juncea) intercropping system under different weed management practices

2016 ◽  
Author(s):  
Ranjeet Kour ◽  
B. C. Sharma
Keyword(s):  
Growth Rate ◽  
Weed Management ◽  
Management Practices ◽  
Crop Growth ◽  
Net Assimilation Rate ◽  
Assimilation Rate ◽  
Growth Indices ◽  
Replacement Series ◽  
Crop Growth Rate ◽  
Net Assimilation

A field experiment was carried out during rabi seasons of 2009-10 and 2010-11 at the Research Farm of Sher-e-Kashmir University of Agricultural Sciences and Technology at Chatha, Jammu to assess the physiological growth indices in chickpea+mustard intercropping system under different weed management practices. The significant superiority of replacement series treatment for leaf area index of mustard over additive series treatment was noticed. The sole crop of mustard was followed by replacement and additive series treatments in recording highest dry matter, crop growth rate and net assimilation rate values. Sole stand of mustard recorded numerically higher relative growth rate (RGR) followed by replacement and additive series treatments. Weed free treatment recorded numerically highest crop growth rate (CGR) and net assimilation rate (NAR) of mustard at all the stages of observation. As regards yield, sole stand recorded significantly higher values of grain and was followed by additive and replacement series which in turn were differed significantly from one another in chickpea+mustard intercropping system.

scholarly journals Assessing Crop Growth Indices of Nadia Variety of Ginger (Zingiberofficinale Rosc.) under Legume Intercropping and Weed Management Practices

2020 ◽  
pp. 74-81
Author(s):  
Aparna Baruah ◽  
Jayanta Deka
Keyword(s):  
Growth Rate ◽  
Weed Management ◽  
Management Practices ◽  
Crop Growth ◽  
Growth Indices ◽  
Area Index ◽  
Crop Growth Rate ◽  
Absolute Growth ◽  
Hand Weeding ◽  
The Impact

A study was initiated in Instruction-cum-Research Farm of Assam Agricultural University, Jorhat-13, Assam, India during 2014-15 and 2015-16. The objective of this experiment is to understand the impact of legume intercropping system in combination with different weed management practices on the growth indices of ginger crop. Nadia, a commercially grown variety of ginger in Assam was examined in the current study. A total of 16 treatment combinations were considered which comprised of 4 intercropping systems along with 4 weed management practices. Amongst the legume intercropping, Cowpea in between rows of Ginger; incorporated at 40 days after sowing (DAS) and Cowpea in alternate rows of Ginger; incorporated at 40 DAS recorded better results in terms of Leaf area index (LAI), Crop growth rate (CGR), Absolute growth rate (AGR) and yield of Nadia variety ginger. Whereas amongst the weed management practices, pre-emergence application of Metribuzin 500 g ai ha-1 + hand weeding (HW) at 70, 100 and 140 days after planting (DAP) scored higher in growth indices and ginger yield, but neither the legume intercropping systems nor the weed management treatments had any significant impact on harvest index.

Environmental and Agronomic Effects on the Growth of Four Peanut Cultivars in a Sub-tropical Environment. II. Dry Matter Partitioning

1993 ◽  
Vol 29 (4) ◽  
pp. 491-501 ◽  
Author(s):  
M. J. Bell ◽  
G. C. Wright ◽  
G. Harch
Keyword(s):  
Growth Rate ◽  
Dry Matter ◽  
Plant Density ◽  
Spatial Arrangement ◽  
Crop Growth ◽  
Crop Growth Rate ◽  
Pod Yield ◽  
Sowing Dates ◽  
Rate Of Increase ◽  
Peanut Cultivars

SummaryThe partitioning of dry matter between vegetative and reproductive yield components was analysed for four diverse peanut cultivars at a range of sowing dates and plant populations in sub-tropical Queensland, Australia. Rates of accumulation of pods (pod addition) varied significantly with both cultivar and sowing date. Within cultivars, much of this variation could be attributed to variation in crop growth rate during the critical pod addition period. The proportion of current assimilate distributed to pods depended on inherent cultivar characteristics and also correlated well with the current crop growth rate relative to the crop growth rate during pod addition (that is, with relative source activity). Neither plant density nor spatial arrangement had any significant effects on patterns of assimilate distribution. All cultivars appeared capable of remobilizing stored assimilate to maintain constant rates of pod yield increase despite fluctuations in crop growth rate which might be expected to produce short term source limitations to pod yield accumulation. The harvest index (HI) increased linearly during the entire pod fill period in all cultivars except the very early maturing Spanish cultivar Chico. Neither density nor spatial arrangement affected rate of increase in HI except in Chico, where increased density produced increased rates of increase in HI. Variation in the rate of HI increase among sowing dates was small.Distributión de la materia seca en el maní

scholarly journals Evaluating the performance of introduced varieties of maize under different planting dates and environments (some genetic parameters (LAI, TDM, DTM, CGR )

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Kamal Ahmed Kazem Wajeeha Abed Hassan
Keyword(s):  
Growth Rate ◽  
Dry Matter ◽  
Crop Growth ◽  
Area Index ◽  
Crop Growth Rate ◽  
Plant Yield ◽  
Physiological Maturity ◽  
Sowing Dates ◽  
Dry Matter Weight ◽  
Gm Plant

"To evaluate the performance of introduced varieties of maize under different sowing dates and locations, in addition to local variety, a field experiment was carried out in two locations; the first fields was at the College of Agricultural Engineering Sciences Baghdad University Al-Jadriya and the second location was at Diyala Governorate Muqdadiya District, fields of the Diyala Governorate Agriculture Directorate, for the fall season 2019. The study compared five varieties of maize introduced from America with a local synthetic variety (Ibba 5018) and tested it in two locations at three sowing dates (1, 15 July and 1 August). The Randomized Complete Block Design RCBD was used with four replications, with spilt plot arrangements, the main plots included three sowing dates, the secondary plots included, the varieties. The traits of leaf area index, total dry matter weight, the number of days to Physiological maturity, crop growth rate, and individual plant yield were studied.The results showed that the date of August 1 exceeded at the Baghdad location with the most studied traits, such as the number of days to physiological maturity (87.50 days) and plant yield (213.7 g), while the second date for the same location exceeded some traits such as leaf area index (4.81) and dry matter weight (421.7 g) and the crop growth rate is 4.715 gm plant-1,day-1.As for Diyala, the second date exceeded as the plant yield (182 g).Results showed the superiority of cultivar 3 for most of the traits in the Baghdad location, such as the weight of dry matter (459 g) and crop growth rate (5.2 gm plant-1 day-1 ),and plant yield (204 g). It also cultivar 3 in Diyala with the highest yield of plant (188.5 g) as a result of its superiority in terms of dry weight and crop growth rate. In the Cumulated analysis, the difference between the two locations was insignificant, whereas in the dates, the two dates were superiored in (July 15 and August 1) the highest yield for plant (182.2 and 187.3 g). Interaction was significant between sowing dates and locations(L×D), sowing dates and varieties (D×V), between varieties and locations(L×V), and the triple interaction of most of the studied traits(L×D×V)"

The growth and performance of rain-grown cotton in a tropical upland environment: II. The relationship between yield and growth

1972 ◽  
Vol 79 (1) ◽  
pp. 137-145 ◽  
Author(s):  
A. B. Hearn
Keyword(s):  
Growth Rate ◽  
Crop Growth ◽  
Daily Growth ◽  
Demand And Supply ◽  
Cotton Crop ◽  
Crop Growth Rate ◽  
Sowing Dates ◽  
And Performance ◽  
Set Up ◽  
The Relationship

SUMMARYAn hypothesis, based on Mason's nutritional theory of boll shedding, was set up to relate the yield of cotton to crop growth in three agronomic experiments. It was postulated that bolls were set only if the demand for carbohydrates of the metabolic sink which they formed did not exceed the supply, both of which were estimated. Two components of the sink were recognized — the daily growth rate of a single boll, DGRB, and the number of bolls on the crop plants. The effects of genotype and environment on these components were analysed. Their product gave the size of the boll sink, CB, which was compared with the crop growth rate, C, to indicate respectively carbohydrate demand and supply. Three sets of evidence to support the hypothesis were considered: (i) when CB > C, the number of bolls, and hence the size of the sink, ceased to increase, and bolls started to shed heavily; (ii) a model to predict yield, based on the hypothesis, accounted for all non-random variation in yield between sowing dates and varieties; (iii) the correlation between yield and various crop attributes, recorded before picking, became strikingly closer between 110 and 130 days from sowing when CB > C, suggesting that yield was determined during that period of time. The network of relationships, studied in these papers in order to relate the yield of a cotton crop to its environment and genotype through their effect on its growth, indicates the form of a dynamic model to simulate growth and predict yields.

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