Seed Yield and Yield Attributes of Lablab (Lablab purpureus L. Sweet) as Influenced by Phosphorus Application, Cutting Height and Age of Cutting in a Semi-Arid Environment

A field experiment was conducted during kharif 2013 and 2014 to study the effect of row spacing and sowing time on seed yield, galactomannan and protein content and nutrient uptake of guar in semi arid climate of Southern Telangana. The crop sown at row spacing of 30 cm recorded significantly higher seed yield than that of 45 cm and 60 cm spacing. Production and rainfall use efficiency and harvest index besides growth and yield attributes, galactomannan and protein yields, N, P and K uptake were also significantly higher at 30 cm spacing. Sowing of guar during first or second fortnight of July resulted in significantly higher seed yield than first fortnight of August sowing. Production efficiency, plant height, number of clusters plant-1 and protein yield followed the similar trend of seed yield. Negative relationship was observed between galactomannan content and sowing time. Though powdery mildew infection was higher in early sown crop and close crop spacing, higher plant population and biomass production resulted in higher seed yield of guar when compared to late sown crop and wider spacing.

Download Full-text

Effect of date and final irrigation on yield and yield components of sunflowers in a semi-arid environment

Australian Journal of Experimental Agriculture ◽

10.1071/ea9770482 ◽

1977 ◽

Vol 17 (86) ◽

pp. 482 ◽

Cited By ~ 10

Author(s):

CL Browne

Keyword(s):

Water Use ◽

Seed Yield ◽

Yield Components ◽

Seed Weight ◽

Arid Environment ◽

Irrigation Season ◽

Yield And Yield Components ◽

Dry Climates ◽

Total Oil ◽

Semi Arid

In the semi-arid irrigation areas of south-western New South Wales, many sunflower crops receive no irrigation after flowering. In these dry climates, such premature termination of irrigation could be leading to substantial yield losses. The effect of date of final irrigation on yield and yield components of sunflowers (cv. VNIIMK 6540) was thus examined in two experiments. In the first experiment, seed yield was increased by 19 per cent when final irrigation was applied 22 days after mid-flowering, rather than at mid-flowering. The higher yield resulted principally from an increase in the number of harvestable seeds. Higher frequency of irrigation further increased seed yield by 9 per cent via increase in seed weight. Estimated total consumptive water use by treatments ranged from 546 to 677 mm and the regression of yield (kg ha-1) on water use (mm) was y = 3.9x - 47.4 (r = 0.77, P < 0.001). In the second experiment, in which all treatments were irrigated at a high frequency, seed yield was increased by 30 per cent and total oil yield by 48 per cent when final irrigation was applied 16 days after mid-flowering, rather than at mid-flowering. Both seed weight and seed number were increased by the later irrigation. No further yield improvement was achieved by extending the irrigation season to encompass physiological maturity (a mean 31 days after mid-flowering).

Download Full-text

Canopy temperature depression (CTD) and canopy greenness associated with variation in seed yield of soybean genotypes grown in semi-arid environment

South African Journal of Botany ◽

10.1016/j.sajb.2017.08.016 ◽

2017 ◽

Vol 113 ◽

pp. 230-238 ◽

Cited By ~ 8

Author(s):

M. Kumar ◽

V. Govindasamy ◽

J. Rane ◽

A.K. Singh ◽

R.L. Choudhary ◽

...

Keyword(s):

Seed Yield ◽

Canopy Temperature ◽

Arid Environment ◽

Canopy Temperature Depression ◽

Soybean Genotypes ◽

Temperature Depression ◽

Semi Arid

Download Full-text

Differential physio-biochemical and yield responses of Camelina sativa L. under varying irrigation water regimes in semi-arid climatic conditions

PLoS ONE ◽

10.1371/journal.pone.0242441 ◽

2020 ◽

Vol 15 (12) ◽

pp. e0242441

Author(s):

Zeeshan Ahmed ◽

Junhe Liu ◽

Ejaz Ahmad Waraich ◽

Yan Yan ◽

Zhiming Qi ◽

...

Keyword(s):

Seed Yield ◽

Camelina Sativa ◽

Yield Potential ◽

Growth Stages ◽

Oilseed Crop ◽

Biochemical Activity ◽

Yield Attributes ◽

Arid Conditions ◽

Yield Responses ◽

Semi Arid

Camelina sativa L. is an oilseed crop with wide nutritional and industrial applications. Because of favorable agronomic characteristics of C. sativa in a water-limiting environment interest in its production has increased worldwide. In this study the effect of different irrigation regimes (I0 = three irrigations, I1 = two irrigations, I2 = one irrigation and I3 = one irrigation) on physio-biochemical responses and seed yield attributes of two C. sativa genotypes was explored under semi-arid conditions. Results indicated that maximum physio-biochemical activity, seed yield and oil contents appeared in genotype 7126 with three irrigations (I0). In contrast water deficit stress created by withholding irrigation (I1, I2 and I3) at different growth stages significantly reduced the physio-biochemical activity as well as yield responses in both C. sativa genotypes. Nonetheless the highest reduction in physio-biochemical and yield attributes were observed in genotype 8046 when irrigation was skipped at vegetative and flowering stages of crop (I3). In genotypic comparison, C. sativa genotype 7126 performed better than 8046 under all I1, I2 and I3 irrigation treatments. Because 7126 exhibited better maintenance of tissue water content, leaf gas exchange traits and chlorophyll pigment production, resulting in better seed yield and oil production. Findings of this study suggest that to achieve maximum yield potential in camelina three irrigations are needed under semi-arid conditions, however application of two irrigations one at flowering and second at silique development stage can ensure an economic seed yield and oil contents. Furthermore, genotype 7126 should be adopted for cultivation under water limited arid and semi-arid regions due to its better adaptability.

Download Full-text

Irrigation, nitrogen and sulphur fertilization response on productivity, water use efficiency and quality of Ethiopian mustard (Brassica carinata) in a semi-arid environment

Journal of Applied and Natural Science ◽

10.31018/jans.v10i2.1741 ◽

2018 ◽

Vol 10 (2) ◽

pp. 593-600

Author(s):

O.P. Verma ◽

S. Singh ◽

S. Pradhan ◽

G. Kar ◽

S.K. Rautaray

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Seed Yield ◽

Agricultural Research ◽

Arid Environment ◽

Brassica Carinata ◽

Ethiopian Mustard ◽

Use Efficiency ◽

Semi Arid

Water and nutrient deficiency are two major constraints that drastically affect rapeseed and mustard production under semi-arid regions of North-Western India. To cope with this problem, a study was undertaken to optimize irrigation, nitrogen and sulphur levels for productivity and quality of Ethiopian mustard(Brassica carinata).Field experiments were conducted during winter seasons of 2004-05 and 2005-06 at the Water Technology Centre (WTC), Indian Council of Agricultural Research (ICAR) – Indian Agricultural Research Institute (IARI), New Delhi, India. Irrigation, nitrogen and sulphur levels significantly (P<0.05) affected plant height, LAI, siliqua weight, seeds/siliqua, test weight, seed and biomass yield of Ethiopian mustard. Application of three irrigations (seedling, 50% flowering and pod development stage) to Ethiopian mustard increased seed yield by 27-28% compared to one irrigation (seedling stage). Nitrogen @ 90 kg ha-1 produced 49-54 % higher seed yield of Ethiopian mustard compared to no application. Similarly, sulphur application @ 40 kg ha-1 increased seed yield by 33-34 % compared to no application of sulphur. The oil content of Ethiopian mustard was significantly (P<0.05) affected by nitrogen and sulphur levels. Among the three treatments, irrigation treatment only significantly affected evapotranspiration of the studied crop. From the above study, it is suggested that application of 3 irrigations with 90 kg N ha-1 and 40 kg S ha-1 may be practiced for achieving higher seed yield, quality and water use efficiency of Ethiopian mustard in the semi-arid environment of Northern part of India.

Download Full-text