scholarly journals Production process and the yield of hay Medicago sativa l. of the first year of life in rice crop rotation

2019 ◽  
pp. 19-22
Author(s):  
Elvira Batyrevna Dedova ◽  
Galina Nagashevna Konieva ◽  
Bairta Borisovna Erdneeva
Keyword(s):  
Medicago Sativa ◽  
Crop Rotation ◽  
Maximum Yield ◽  
Rice Crop ◽  
First Year ◽  
Seeding Rate ◽  
Residual Moisture ◽  
Parabolic Form ◽  
Medicago Sativa L ◽  
First Year Of Life

The predecessors of rice, combined with their characteristic agricultural machinery, restore soil fertility, increase the yield of rice, provide forage products and as a result determine the productivity of the entire rotation of the crop rotation. In the rice crop rotations of the Sarpinsky lowland, studies are conducted to study the yield of alfalfa of the 1st year of life in the rice crop rotation on the reserves of productive moisture remaining after rice at different seeding rates. The soil cover of rice cheques is represented by brown semi-desert medium-and heavy-loamy soils in combination with saline. In the first year of the life of alfalfa (Medicago sativa L.) two residues of above-ground mass were obtained on residual moisture reserves (250–320 mm) after rice. The maximum yield of hay for two mowing 2.86-3.62 t/ha was obtained in the version with a seeding rate of 9.0 million pieces /ha, which is 0.86-1.21 t/ha more than the control option (5.0 million pcs/ha). It has been developed a dynamic model based on the yield of hay from alfalfa seeding rate seed having parabolic form with a maximum on top with a seeding rate of 9.0 million pcs/ha.

INFLUENCE DES CULTIVARS, DES DATES ET DES DOSES DE SEMIS SUR LE RENDEMENT ET LA QUALITÉ DE LA LUZERNE SEMÉE EN FIN D’ÉTÉ

1984 ◽  
Vol 64 (3) ◽  
pp. 667-675 ◽  
Author(s):  
L. BELZILE
Keyword(s):  
Medicago Sativa ◽  
Crude Protein ◽  
Dry Matter ◽  
First Year ◽  
Seeding Rate ◽  
Yield And Quality ◽  
Seeding Date ◽  
Yield Quality ◽  
Medicago Sativa L

The effects of cultivars, date and rate of seeding on the yield and quality of alfalfa (Medicago sativa L.) seeded at the end of summer and harvested the year after was studied from 1971 to 1975 on a Kamouraska clay. Seeding in early August gave the best results; seeding should not be carried out after mid-August. Differences between cultivars were more important on the third than on the first cut. Aftergrowth was an important factor on yield during the first year of harvest. Seeding rate did not always affect the yield, but the 6,7 kg/ha rate yielded less than the 13,4 kg/ha rate at the first cut and when the cuts were summed. The combined effects of the three factors studied indicates the importance of the seeding date on the height, cover and yield of alfalfa. Digestibility and crude protein content of the dry matter were affected more by seeding dates than by cultivars. The effect of cultivars on quality was variable and seeding rates had no effect. The variation in forage quality may be attributed to a difference in maturity of the plant at harvest, rather than only to the factors studied.Key words: Medicago sativa L., cultivar, date, rate, yield, quality

ALFALFA VARIETIES ZONED IN THE CENTRAL CHERNOZEM ZONE OF THE RUSSIAN FEDERATION

2020 ◽  
Author(s):  
Galina Stepanova
Keyword(s):  
Medicago Sativa ◽  
Dry Matter ◽  
Maximum Yield ◽  
The State ◽  
Average Yield ◽  
State Register ◽  
Independent Evaluation ◽  
Medicago Sativa L ◽  
Alfalfa Varieties ◽  
Central Chernozem

The article describes the main morphological and biological features of alfalfa varieties included in the State register of breeding achievements approved for use in the Central Chernozem zone of Russia. A total of 32 alfalfa varieties are included in the State register. This is 9 varieties of blue alfalfa (Medicago sativa L. subsp. Sativa) of domestic selection and 8 foreign, 11 varieties of variable alfalfa (Medicago sativa L. nothosubsp. varia (Martyn) Arcang.) domestic selection and 1 variety of foreign and 3 varieties of yellow alfalfa (Medicago sativa L. subsp. falcata (L.) Arcang.). It shows the average and maximum yield of varieties determined in the process of state variety testing, as well as independent evaluation in research institutions in the region. Varieties of blue alfalfa of domestic selection Kevsala, Elena, Satellite, Vavilovskaya Yubileynaya were the most productive. The average yield of dry matter of these varieties reaches 8.4–9.2 t/ha, the maximum — 15.3–17.7 t/ha. Alfalfa varieties Timbale and Galaxy were the most productive among foreign varieties: the average yield of dry matter was 8.1 and 8.3 t/ha, the maximum – 15.5 and 17.2 t/ha. Varieties of alfalfa variable Vitalina and Vela provided an average yield of dry matter of 7.6 and 9.0 t/ha, the maximum yield reached 15.4 and 18.1 t/ha.

Establishment and productivity of cicer milkvetch (Astragalus cicer L.) in alfalfa (Medicago sativa L.) or alfalfa- hybrid bromegrass mixtures

2021 ◽  
Author(s):  
Allan Foster ◽  
Bill Biligetu
Keyword(s):  
Medicago Sativa ◽  
Aqueous Extract ◽  
Nutritive Value ◽  
Forage Yield ◽  
Allelopathic Effect ◽  
Limited Information ◽  
Seeding Rate ◽  
Bromus Riparius ◽  
Medicago Sativa L ◽  
Astragalus Cicer

Cicer milkvetch (Astragalus cicer L.) (CMV) is a non-bloating, perennial legume that has shown persistence under grazing. Limited information is available on its seedling establishment and subsequent forage yield and nutritive value in alfalfa (Medicago sativa L.) mixtures. Field plots were seeded in May 2013 at Melfort, SK, Canada to evaluate ‘Oxley II’ cicer milkvetch performance in ‘AC Grazeland’ alfalfa or alfalfa and ‘AC Success’ hybrid bromegrass (Bromus riparius × B. inermis) mixtures from 2014 to 2017. Two controlled environment tests were also conducted by treating seeds of CMV using alfalfa root aqueous extract. Seed germination and seedling height of CMV were significantly reduced in aqueous extract. In field, establishment of CMV in a mixture containing alfalfa was reduced, and CMV dry matter proportion in the mixture increased only 3.5% over three years. Increasing CMV seeding rate did not increase its DM percent in the mixtures, indicating a high allelopathic effect of alfalfa. Forage DM yield of all mixtures was linearly correlated to the proportion of alfalfa, and adding hybrid brome did not increase the DM yield. Forage DM yield was higher for the three-cut than the two-cut treatments for CMV-alfalfa mixtures, but there was no difference between the cutting frequency for CMV-alfalfa- hybrid brome mixtures. Fiber concentrations decreased linearly with increased CMV seeding rate in the mixtures. This study showed CMV establishment in alfalfa mixtures was reduced in a same row seeding, and the allelopathic effect was not reduced by lower alfalfa seeding rates or adding a grass.

scholarly journals The production and water extraction of lucerne and ryegrass under different irrigation frequencies on a shallow soil.

2014 ◽  
Vol 76 ◽  
pp. 221-228
Author(s):  
A.J. Michel ◽  
H.E. Brown ◽  
E.I. Teixeira ◽  
E.D. Meenken ◽  
S. Maley ◽  
...  
Keyword(s):  
Medicago Sativa ◽  
Lolium Perenne ◽  
Biomass Production ◽  
Irrigation Treatment ◽  
Water Extraction ◽  
First Year ◽  
Irrigation Frequency ◽  
Shallow Soil ◽  
Dry Conditions ◽  
Medicago Sativa L

Abstract A field experiment was conducted on a shallow soil (low plant available water holding capacity) at Lincoln (Canterbury, New Zealand) to compare the biomass production of lucerne (Medicago sativa L.) and perennial ryegrass (Lolium perenne) under four different irrigation frequencies: (T1) replacing water use (WU) twice a week (replicating centre pivot rewetting frequencies); (T2) replacing WU fortnightly (replicating travelling irrigator); (T3) replacing WU every 3 weeks (replicating border dyke); (T4) nil irrigation (rain fed only). Soil water content was measured hourly at 0-30 cm depth and fortnightly at 0-150 cm depth. Plots were sown in March 2011 and defoliated on eight (ryegrass) and five to six (lucerne) occasions each season between September 2011 and May 2014. Annual biomass production during the first year was highest for ryegrass under each treatment because the lucerne crops were still establishing. During the second and third year of experimentation ryegrass yielded higher or similar to lucerne under the irrigated treatments (T1, T2 and T3). This was attributed to a decline in lucerne stands due to weed pressure. It is important to note that the ryegrass crop has received 250-700 kg N/ha per year depending on the irrigation treatment. Under dry conditions (T4) ryegrass yielded more than lucerne in both year 2 and 3. This result contrasts the literature and is attributed to the greater capacity of ryegrass to grow in cooler season and the stony sub-soil meaning lucerne received no summer yield advantage from its deep tap root. Key words: Medicago sativa L., Lolium perenne, biomass, water extraction, irrigation frequency

scholarly journals Effect of Row Spacing and Seeding Rate on Yield Component and Seed Yield of Alfalfa (Medicago sativa L.)

2010 ◽  
Vol 2 (1) ◽  
pp. 74-80 ◽  
Author(s):  
Gholamreza ABADOUZ ◽  
Abdollah HASANZADEH GORTTAPEH ◽  
Abdol Amir RAHNEMA ◽  
Adela BEHRADFAR
Keyword(s):  
Medicago Sativa ◽  
Seed Yield ◽  
Yield Component ◽  
Row Spacing ◽  
Seeding Rate ◽  
Medicago Sativa L

scholarly journals Variability of demographic parameters and population dynamics of Atlantic salmon Salmo salar L. in a south-west French river

2003 ◽  
Vol 60 (2) ◽  
pp. 356-370 ◽  
Author(s):  
J. Dumas ◽  
P. Prouzet
Keyword(s):  
Survival Rate ◽  
Survival Rates ◽  
Maximum Yield ◽  
First Year ◽  
South West ◽  
Salmon Population ◽  
Second Year ◽  
First Year Of Life ◽  
French River ◽  
Good Agreement

Abstract The abundance of the salmon population in the Nivelle River was assessed for 11 cohorts during all the stages of their life cycle, from eggs to spawners. A stochastic life history model was used to simulate the changes in numbers at each stage over several years and to evaluate the parameters of a Ricker-type Stock and Recruitment (S–R) relationship. Parameters necessary for managing the exploitation of the species were also estimated. The results indicated that an average deposition of 611 700 eggs (values varying in a proportion of 1 to 3, depending on the year) produced 4870 0+ parr in autumn (variation from 1 to 5.6); 71.8% of which belonged to the group of future 1-year old smolts. The age 1+ parr were eight times less numerous. Survival from egg to 0+ parr was on average 0.97%, but highly variable (varying from 1 to 15). It was density-dependent and followed Ricker S–R model with an optimum of 7800 parr for a survival rate of 3%. During their second year, the survival of 1+ parr reached 53.4% and varied little. The adult runs of complete cohorts amounted to 196 maiden salmon (range, 88 to 382) and previous spawners comprised only 0.9% of adults. Grilse (1 year in the sea) constituted the majority (88.7%). The overall survival rates from 0+ parr to adult returns (6.2% on average) varied three-fold. The majority was females among the grilse (56.2%) and 2-sea-year salmon (88.6%); all 3-sea-year adults were female. Eggs deposited per female averaged 4200, 8500 and 12 750 eggs in each age group, respectively. Simulations of population abundances at various life stages were in good agreement with the observed data. The S–R relationship revealed the low productivity and the vulnerability of this stock, mainly due to the low survival rate of the young during their first year of life. The maximum yield of 12.2% of recruits could be obtained from a deposition of 1 424 000 eggs, which is twice the present average level.

scholarly journals Influence of barley seeding rate and fertilizer dose on the yield of melilot in the subcover sowing in the rice crop rotation

2020 ◽  
Vol 69 (1) ◽  
pp. 65-73
Author(s):  
Raushan Nurymova ◽  
Laura Tokhetova ◽  
Bibigul Baizhanova ◽  
Gulmira Daldabaueva
Keyword(s):  
Crop Rotation ◽  
Rice Crop ◽  
Seeding Rate

scholarly journals Highly-productive seed grass stands of meadow fescue pasture-lawn ecotype

2018 ◽  
pp. 25-35 ◽  
Author(s):  
V. N. Zolotarev ◽  
N. I. Perepravo
Keyword(s):  
Maximum Yield ◽  
Cost Effective ◽  
First Year ◽  
Row Spacing ◽  
Seeding Rate ◽  
Meadow Fescue ◽  
Podzolic Soils ◽  
Planting Methods ◽  
Seed Content ◽  
Effective Efficiency

Efficiency of industrial use of agricultural crops is determined by economic parameters of varieties and technologies of their cultivation. The paper determines appropriate seeding rates and planting methods for meadow fescue (Festuca pratensis Huds.) of pasture and lawn Quart variety. These rates and methods contribute to better structure of seed grass for maximum yield on sod-podzolic soils in the central part of Russia. The authors found out that sowing from 4 to 16 kg/ ha of oatmeal seeds with a row spacing of 15 and 30 cm results in the shoots equal to 59 to 69 %. In this case, the authors observed inverse pattern of reducing the value of the index of shoots with increased seeding rate and row spacing. Breeding highly productive seed agrophytocenoses with efficient parameters of structure and sowing density (132-254 un /m2) at three-year usage of herbage is recommended to be carried out by means of row planting (15 cm) or skip-row planting (30 cm) with 8-4 sowing rates kg/ha (3,6-1.8 million un/ha of germinating seeds). This results in receiving 429-446 seed yield kg/ha during three years of usage. Most efficient way of initiation highly productive seed grass stands of meadow fescue Quart variety is seen as open sowing. It forms 13% higher number of generative shoots with 14% higher seed content in the first year of undersowing. In the second and third years of application, the influence of nurse crop on the aftereffect on meadow fescue productivity is not observed. Cultivation of meadow fescue with a sub-method is cost-effective. Efficiency of meadow fescue seeds in open sowing is 89 %, when sown under barley it was equal to 82 %. The authors make a case that the way of seed initiation of meadow fescue grass stands and nurse crop in the commercial production of seeds should be based on economic activity of seed breeding enterprises.

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