Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/67245
Authors: ZOHMINGLIANA, KENNY
Advisor: HUSSAIN, S.A.
Title: INFLUENCE OF IRRIGATION SCHEDULING AND INTEGRATED NUTRIENT MANAGEMENT ON GROWTH AND YIELD OF RABI MAIZE (Zea mays L.)
Publisher: ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY
Language: en
Type: Thesis
Series/Report no.: D9101;
Agrotags: irrigation, maize, yields, irrigation scheduling, planting, grain, nutrients, farmyard manure, crops, diseases
Abstract: The experiment was conducted during rabi season of 2011 – 2012 at the College Farm, ANGRAU, Rajendranagar, Hyderabad, Andhra Pradesh, India. The treatments consisted of four irrigation schedules viz., I1 (Critical stages approach), I2 (0.8 IW/CPE), I3 (1.0 IW/CPE) and I4 (1.2 IW/CPE) and three integrated nutrient management proportion viz., N1 (100% RDN inorganic), N2 (75% RDN inorganic + 25% FYM), N3 (50% RDN inorganic + 50% FYM summing up to 12 treatment combinations laid out in Split plot design with three replications. The crop was planted on 24th October 2011. The experimental soil was sandy loam in texture and alkaline in soil reaction (pH 7.8) and recorded 0.21 dS m-1 electrical conductivity. The soil was low in available nitrogen (226 kg N ha-1) and available phosphorus (18.5 kg P2O5 ha-1) and medium in available potassium (235 kg K2O ha-1). Growth parameters viz., plant height, leaf area index and dry matter production were measured/ determined at periodical intervals. Likewise yield attributes viz., no. cobs plant-1, cob length, cob girth, no. of grains cob-1, test weight (1000-grain weight), grain yield, strover yield and harvest index were measured at harvest. Nutrient (NPK) uptake was estimated at harvest both in grain and straw and expressed as total NPK uptake. Also, the seasonal water use and the crop coefficient were also determined. Regarding growth traits, a significant effect of irrigation scheduling on plant height was observed only at 90 DAS where I3 (1.0 IW/CPE) gave superior performance; LAI was highest with I3 (1.0 IW/CPE); and dry matter production was highest under I3 (1.0 IW/CPE) and I4 (1.2 IW/CPE) in comparison to other treatments. Each increment in the proportionate doses of RDN through inorganic significantly increased the plant height, leaf area index and dry matter production in the order N1, N2 and N3 treatments, respectively. Further concerning yield attributes, I4 (1.2 IW/CPE) and I3 (1.0 IW/CPE) registered statistically on par but superior performance in terms no. of cobs plant-1, but in terms of cob length, I3 recorded the longest cob which was on par with I2 (0.8 IW/CPE). Concerning no. of grains cob-1 and test weight, I3 (1.0 IW/CPE) gave superior performance in comparison to other treatments. Irrigation scheduling failed to show a significant effect in terms if cob girth. Each increment in the proportionate doses of RDN through inorganic significantly increased the no. of cobs plant-1, cob length, cob girth, grains cob-1 and test weight over its lower proportionate doses of RDN and with the increased replacement through FYM. Irrigation scheduled at 1.0 IW/CPE (I3) produced significantly higher grain and stover yield of rabi maize but it was on par with 1.0 IW/CPE (I4) owing to improved growth and yield traits. Considering an interaction effect between irrigation scheduling and integrated nutrient management, a significant higher grain and stover yield was obtained under I3N1 treatment. Each increment in the proportionate doses of RDN through inorganic significantly increased the grain and stover yield over its lower proportionate doses of RDN and with the increased replacement through FYM owing to improved growth and yield traits. Among irrigation schedules, N and P uptake was more by I3 (1.0 IW/CPE) whereas K uptake was more with I4 (1.2 IW/CPE). Each increment in the proportionate doses of RDN through inorganic increased N and P uptake, but in case of K, uptake increases from N3 to N2 and later decreases to N1 treatment. Water use efficiency decreased with each higher frequency of irrigation from I1 to I4 treatments. Concerning INM, with every increased substitution of RDN (inorganic) with organic source (FYM) i.e. from N1 to N3, water use efficiency increases in which N3 (50% RDN + 50% FYM) treatment achieved highest water use efficiency. Irrigation scheduling at highest level i.e. 1.2 IW/CPE ratio required more water compared to other lower level. The lowest water use was recorded under irrigation scheduled according to critical stage approach. Each increment in the proportionate doses of RDN through inorganic required more water. Irrigation scheduling through 1.2 IW/CPE ratio resulted in higher crop coefficient value at each crop growth stages viz., early vegetative, vegetative, tasseling, silking and milking and dough and physiological maturity stages, respectively. The peak crop coefficient was achieved during mid season stage followed by development stage owing to more water loss through transpiring surface.
Issue Date: 2012
Appears in Collections:Theses

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