Yield and nutrient uptake by wheat as influenced by integrated use of manures and fertilizers

An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during November 2011 to March 2012 to evaluate the effect of integrated use of manures and fertilizers on the growth, yield and nutrient uptake by wheat. There were six treatments such as T0 (Control), T1 [STB-CF (HYG)], T2 [CD + STB-CF (HYG)], T3 [PM + STB-CF (HYG)], T4 [COM + STB-CF (COM)] and T5 [FP (Farmers’ practice)]. The experiment was laid out in a Randomized Complete Block Design with four replications. The integrated use of manures and fertilizers significantly influenced the yield attributes as well as grain and straw yields of wheat. The treatment T1 [STB-CF (HYG)] produced the tallest plant of 90.17 cm which was identical with T3 [PM + STB-CF (HYG)] and the lowest value was found in control. The 1000-grain weight followed the similar pattern but the tillers hill -1 , spike length and spikelets spike -1 did not follow any definite trend. The treatment T3 [PM + STB-CF (HYG)] produced the highest grain yield of 4362 kg ha -1 (90.4% increase over control) and straw yield of 5492 kg ha -1 (84.79% increase over control). The lowest grain yield (2291 kg ha -1 ) and straw yield (2972 kg ha -1 ) were found in T0 (Control). The NPKS uptake by wheat was markedly influenced by combined use of manures and fertilizers and the treatment T3 demonstrated superior performance to other treatments. So the treatment T3 comprising poultry manure in combination with chemical fertilizers on IPNS basis was found to be the best combination of manures and fertilizers for obtaining the maximum yield and quality of wheat at BAU farm.

], T2 [CD + STB-CF (HYG)], T3 [PM + STB-CF (HYG)], T4 [COM + STB-CF (COM)] and T5 [FP (Farmers' practice)].The experiment was laid out in a Randomized Complete Block Design with four replications.The integrated use of manures and fertilizers significantly influenced the yield attributes as well as grain and straw yields of wheat.The treatment T1 [STB-CF (HYG)] produced the tallest plant of 90.17 cm which was identical with T3 [PM + STB-CF (HYG)] and the lowest value was found in control.The 1000-grain weight followed the similar pattern but the tillers hill -1 , spike length and spikelets spike -1 did not follow any definite trend.The treatment T3 [PM + STB-CF (HYG)] produced the highest grain yield of 4362 kg ha -1 (90.4% increase over control) and straw yield of 5492 kg ha -1 (84.79% increase over control).The lowest grain yield (2291 kg ha -1 ) and straw yield (2972 kg ha Introduction Wheat (Triticum aestivum L.) is the world's leading cereal crop both in area and production and about two-third people of our planet live on it.In Bangladesh, it ranks next to rice and its popularity is increasing consistently.The average yield of wheat in this country is quite low as compared to that of wheat growing countries of the world like China and Japan.
The organic matter content as well as the fertility status of Bangladesh soil is decreasing day by day (BARC, 2012).This depletion has arisen mainly due to continuous mining of soil nutrient over decades without adequate replenishment.Now, it is well agreed that depleted soil fertility is a major constraint for higher crop production in Bangladesh and indeed, the yield of several crops are declining in some soils.Maintenance of soil fertility is a prerequisite for long term sustainable agriculture and organic manure can play a vital role in sustaining soil fertility and crop production.
Since fertile soil is the fundamental resource for higher production, its maintenance is a prerequisite for long term sustainable crop production of crops cannot be maintained by using chemical fertilizers alone and similarly, it is not possible to obtain higher crop yield by using only organic manure (Bair, 2000).Nambiar (2000) viewed that integrated use of manure and fertilizers would be quite promising not only in providing greater stability in production, but also in maintaining higher soil fertility status.Akhtar et al. (2011) reported that fertilizer application along with compost increased the yield, N and P uptake by wheat compared to the fertilizer alone.Toor et al. (2009) conducted an experiment on the effect of application of poultry manure, farm yard manure and urea on available nutrient status of soil in wheat and observed that poultry manure was more effective than farm yard manure for available N and P. The long term research conducted by Bangladesh Rice Research Institute and BAU, Mymensingh reveals that the addition of dung manure along with inorganic fertilizers improves rice productivity as well as prevents the soil resource from degradation.Thus we need to use manure and fertilizer in an integrated way in order to obtain economically profitable crop yields without unacceptable loss to the soil resource.
The organic matter in various forms and at various stages of decomposition has been used in soil in tons ha -1 for improvement of crop productivity.The use of inorganic chemical fertilizers is essential for crop nutrition in order to maximize productivity.The crop yields especially of wheat are stagnant for the last couple of years (BBS, 2010).The use of organic manures along with chemical fertilizers may be effective for further increase in crop yield.The present investigation was, therefore, undertaken to study the effect of manures and fertilizers in IPNS (Integrated Plant Nutrient Management System) system on the growth, yield and nutrient uptake by wheat.

Materials and Methods
The experiment was carried out in the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during during November 2011 to March 2012.The soil belongs to Sonatala series under the AEZ of the Old Brahmaputra Floodplain.The experimental soil was silt loam in texture having pH 6.94, organic matter 1.62%, total nitrogen 0.067%, available phosphorus 10.45 mg/kg, exchangeable K 0.08 me/100g soil, available sulphur 12.00 mg/kg and cataion exchange capacity 15.0 me/100 g soil.Kanchan, a high yielding variety of wheat was used in this experiment as test crop.The experiment was laid out in a randomized complete block design (RCBD) with four replications.The experiment comprised of 6 treatments: T 0 ( Control Well decomposed cowdung, compost, and poultry manure were applied to the plots as per the treatments by mixing with the soil well before 7 days of sowing.The nutrient contents of the manures are depicted in Table 1.The amount of N, P, K, S and B required for each plot was calculated considering the fertilizer urea, TSP, MoP, Gypsum and boric acid, respectively.One third of urea, and the full amount of TSP, MoP, gypsum and boric acid were applied one day before transplanting.The rest of urea was applied in two equal splits one at maximum tillering stage (30 days after sowing) and the other at panicle initiation stage (90 days after sowing).
Seeds of wheat were sown on 30 November 2011 @ 150 kg ha -1 in lines and covered by soil with hand.The line to line distance was 20 cm and the depth of furrow was about 6 cm.A strip of wheat crop was established as border crops.Intercultural operations such as irrigation and weeding were applied as and when necessary.The crop was harvested at full maturity.Grain yield was recorded on 14% moisture basis and straw yield on sun dry basis.Five hills were randomly selected from each plot at maturity to record the yield contributing characters.Grain and straw samples were analyzed for NPKS consents following standard methods (Page et al., 1982).The NPKS uptake by grain and straw was calculated from their contents and yield data.All the data were statistically analyzed by F-test and the mean differences were ranked by DMRT at 5% level (Gomez and Gomez, 1984).(3.85) was obtained in T 1 and the minimum number of 2.80 was observed in T 0 .The treatments T 0 , T 2 and T 4 showed statistically similar effective tillers hill -1 . The highest spike length (11.89 cm) was found in T 5 (farmers 'practices) which was statistically similar with T 1 .The treatments T 2 , T 3 and T 4 were identical in producing spike length of wheat with the values of 10.91 cm, 10.69cm and 10.32 cm, respectively.The lowest spike length of 8.585 cm was obtained in control.The number of spikelets spike -' due to different treatments ranged from 52.46 to 27.28 and the maximum number was observed in the treatment T 1 .The minimum number of spikelets spike -1 (27.28) was found in control.The 1000-grain weight ranged from 53.16g to 50.72g.All the treatments produced significantly higher 1000-grain weight over control.Many research workers reported that combined application of manures and fertilizers increased the plant height and tillers hill -1 (Khan et al., 2007), spike length, ( Singh et al., 2002), and filled grains spike -1 ( Satyannarayana et al., 2002).The results in Table 3 report that the grain yield of wheat varied significantly due to the integrated use of cowdung, compost, poultry manures and NPKS fertilizers.The highest grain yield (4362 kg ha -1 ) was observed in T 3 [PM+ STB-CF (HYG)] and the lowest value (2291 kg ha -1 ) was recorded in T 0 (control).The grain yield produced by T 1 [STB-CF (HYG)] was statistically similar with T 2 [CD + STB-CF (HYG)], T 3 , T 4 [COM + STB-CF (HYG)] and T 5 [FP (Farmers' practice)] although there was a numerical variation in grain yield among the treatments.Based on grain yield, the treatments may be ranked in order of T 3  T 1  T 2  T 4  T 5  T 0 .With same recommended fertilizer doses poultry manure treated plots gave higher grain yield than cowdung and compost treated plots.This might be due to the presence of uric acids in poultry manure that hastens the release of nutrients from poultry manure than compost and cowdung.The increase in grain yield over control ranged from 74.38 to 90.40% where the highest increase was obtained in T 3 and the lowest one was obtained in T 5 .Yakub et. al. (2010) found 6% increase of grain yield by applying urea-N and manures.Haque et al. (2001), Asit et al. (2007) and Bodruzzaman et al. (2010) also found increased grain yield with the application of manures and fertilizers in an integrated way.

Straw yield
The straw yield of wheat also responded significantly due to combined use of manures and fertilizers (Table 3).The maximum straw yield of 5492 kg ha -1 was found in T 3 [PM + STB -CF (HYG)] and the minimum value of 2972 kg ha -1 was noted in T 0 (control).The treatment may be ranked in the order of T 3 >T 2 >T 4 >T 1 > T 5 > T 0 in terms of straw yield.Regarding the percent increase of straw yield, the highest increase (84.79%) was noted in T 3 and the lowest increase (47.22%) was observed in T 5 FP [farmers' practices].Akhtar et al. (2011) also observed that combined application of organic manure and fertilizers significantly increased the straw yield of wheat.The results presented in Table 4 show that the application of cowdung, compost and poultry manure and chemical fertilizers exerted significant influence on the total N uptake by wheat.The maximum N uptake of 108.1 kg ha -1 by wheat was observed in T 1 .The minimum N uptake of 56.04 kg ha -1 was observed in the control.The P uptake was also significantly influenced by the different treatments (Table 4).The highest P uptake by wheat (16.68 kg ha -1 ) was found in T 3 with the application of poultry manure and chemical fertilizers.The lowest P uptake by wheat of 6.593 kg ha -1 was found in T 0 .Poultry manure exerted pronounced effect in increasing the P uptake by wheat compared to cowdung and compost.There was a significant variation in K uptake by wheat due to the various treatments (Table 4).The highest K uptake of 90.44 kg ha -1 by wheat was obtained in the treatment T 3 with the application of poultry manure and chemical fertilizers.The lowest K uptake of 44.91 kg ha -1 by wheat was recorded in the control (T 0 ).The S uptake by wheat was also affected significantly by different treatments (Table 4).The maximum S uptake (12.02kg ha -1 ) by wheat grain was observed in the treatment T 3 with the application of poultry manure and fertilizers which was statistically similar with T 1 [STB-CF (HYG)].The lowest S uptake of 4.637 kg ha -1 was noted in the control (T 0 ).These results are in agreement with the findings of Khan (2007) and Bodruzzaman et al. (2010) who demonstrated that the nutrient uptake by wheat was influenced significantly by integrated use of manures and fertilizers.

Conclusion
Integrated use of manures and fertilizers improve the soil health and fertility status that in turns improve crop yields.The overall results indicate that the yield of wheat varied considerably among the treatments T 1 , T 2 , T 3 , and T 4 although they received the same amount of nutrients but the sources of nutrients were different.Poultry manure in combination with chemical fertilizers (T 3 ) produced the highest grain and straw yield of wheat and it took superior position in all other parameters studied including yield components, NPKS uptake.Therefore, it can be concluded that poultry manure in combination with chemical fertilizers can be used successfully in an integrated way for the successful cultivation of wheat.

Figure
Figure (s) in a column having common letters does not differ significantly.STB=Soil Test Basis, CF=Chemical fertilizer, OM=Organic manure, CD = Cowdung, PM = Poultry manure, COM = Compost, FP = Farmers' practice, HYG = High yield goal, CV = Coefficient of variation, SE = Standard error of means

Figure
Figure (s) in a column having common letters does not differ significantly.STB = Soil Test Basis, CF = Chemical fertilizer, OM = Organic manure, CD = Cowdung, PM = Poultry manure, COM = Compost, FP = Farmers' practice, HYG=High yield goal, CV = Coefficient of variation, SE = Standard error of means

Table 1 .
Nutrient contents in cowdung, compost and poultry manure grain weight were influenced significantly due to application of manures and fertilizer in different combinations (Table2).The tallest plant of 90.17 cm was observed in T 1 [STB-CF (HYG)] with the application of chemical fertilizers at recommended dose and it was identical with T 3 [PM + STB-CF (HYG)].The treatments T 2 [CD + STB-CF (HYG)], T 4 [COM + STB-CF (HYG)] and T 5 [FP (Farmers' practice)] produced statistically similar plant height with the value of 77.148 cm, 77.44 cm and 82.69 cm, respectively.The shortest plant of 66.59 cm was recorded in T 0 .The maximum number of effective tillers hill -1

Table 2 .
Effect of integrated use of manures and fertilizer on the yield components of wheat

Table 3 .
Effect of integrated use of manures and fertilizers on the grain and straw yields of wheat

Table 4 .
The nutrient uptake by wheat as influenced by integrated use of manures and fertilizers Figure (s) in a column having common letters does not differ significantly.STB=Soil Test Basis, CF=Chemical fertilizer, OM=Organic manure, CD = Cowdung, PM = Poultry manure, COM = Compost, FP=Farmers' practice, HYG=High yield goal, CV (%) = Coefficient of variation, SE (±) = Standard error of means