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Deficit irrigation scheduling and yield prediction of ‘Kinnow’mandarin (Citrus reticulate Blanco) in a semiarid region

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Title Deficit irrigation scheduling and yield prediction of ‘Kinnow’mandarin (Citrus reticulate Blanco) in a semiarid region
Not Available
 
Creator Panigrahi, P., Sharma, R. K., Hasan, M. and Parihar, S. S.
 
Subject Citrus Irrigation Plant–water relations Yield parameters Yield prediction
 
Description Not Available
Scarcity of irrigation water in critical growth stages of the crop is one of the major causes of low productivity
and decline of citrus orchards. Regulated deficit irrigation (RDI) is a recently proposed water saving
technique in irrigated agriculture. The present study was planned with a hypothesis that the optimal RDI
scheduling at early fruit growth period (EFGP), which coincides with summer months could save substantial
amount of water, without significantly affecting the yield of ‘Kinnow’ mandarin (Citrus reticulata
Blanco) plants. Two DI strategies: (a) withholding irrigation at EFGP (RDI0) and (b) irrigation at 50% crop
evapotranspiration (ETc) at EFGP (RDI50) were compared with full irrigation (FI, 100% ETc) in relation to
gas exchange, water relation and nutrient composition ofleaves along with growth and yield ofthe plants.
The greater plant growth with maximum fruit yield (61.9–63.2 t ha−1) was recorded with fully-irrigated
plants. However, the yield under RDI50 was statistically (p > 0.05) at par with that under FI. The reduction
in water application of around 24% with RDI50 resulted in 30% improvement in irrigation water use
efficiency with this treatment over that with FI. The maximum rate of net-photosynthesis, stomatal conductance
and transpiration of leaves was recorded with fully-irrigated plants. However, the plants under
RDI50 exhibited the highestleaf water use efficiency. The leaf nutrients (N, P, K, Fe, Mn, Cu and Zn) analysis
revealed that RDI0 produced significantly (p < 0.05) lower concentration of all the nutrients except P and
Cu than that in other treatments. Relative leaf water content (RLWC), leaf water concentration (LWC)
and mid-day stem water potential () showed a decreasing trend, whereas water stress integral (S)
and plant canopy reflectance indices (water band index, WBI; normalised difference water index, NDWI;
and moisture stress index, MSI) showed the reverse trend of RLWC with water stress. The prediction
model formulated based on midday stem water stress integral, leaf N, leaf K, stomatal conductance and
water stress index using Principal component regression technique during EFGP performed well with
reasonably accuracy (R2 = 0.85) to forecast annual fruit yield of the citrus plants. Overall, these results
reveal that irrigation at 50% ETc during EFGP could impose desirable water stress on ‘Kinnow’ mandarin
plants, improving their water use efficiency, without significantly affecting the fruit yield under water
scarce condition.
Not Available
 
Date 2018-12-04T09:38:49Z
2018-12-04T09:38:49Z
2014-03-21
 
Type Research Paper
 
Identifier Panigrahi, P., Sharma, R. K., Hasan, M. and Parihar, S. S. (2014). Deficit irrigation scheduling and yield prediction of ‘Kinnow’mandarin (Citrus reticulate Blanco) in a semiarid region. Agricultural Water Management, DOI: 10.1016/j.agwat.2014.03.018.
0378-3774
http://krishi.icar.gov.in/jspui/handle/123456789/15572
 
Language English
 
Relation Not Available;
 
Publisher Elsevier