Factors Affecting Wheat Growth And Yield Environmental Sciences Essay

Factors Affecting Wheat Growth And Yield butt againstmental knowledges hearContinuous use of inorganic plant foods affects the colly structure and cause environmental pollutions. Sustainableagricultureis one that produces abundant food without depleting the earths resources or polluting its environment. Organic realm provides several benefits to the growers. It reduces production cost and it is an environmentally friendly method of farming. Addition of organic fertilizers improves priming structure and enhances activities of useful skank organisms. Agricultural commodities resulted from organic cultivation are good for gay health. Organic farming system includes semi organic farming system ( menial external input) as one alternative for sustainable agriculture. This study allow be conducted to evaluate the issue and regress of wheat as affected by integrated nutrients (Organic FYM + Inorganic NPK) and drought stress. In the try out wheat cultivar (sehar-2006) give be sown in field plots. Treatments included 50% FYM + 50% Inorganic (NPK) 75% FYM + 25% Inorganic (NPK) degree centigrade% FYM 100% Inorganic (NPK) will be apply. The field plots maintained at 25mm, 50mm and 75mm water system deficit while recommended dose of both(prenominal) organic and inorganic nutrients utilise will be maintained as control. The experiment will be conducted succeeding(a) randomized complete block design with split plot arrangement and common chord replications. During the course of investigation, observations on stand establishment, morphological traits, accept related traits will be recorded following standard procedures. Data will be examine by abstract of variance technique using the computer statistical plan MSTAT-C.Agriculture remains the key sector for the economic development for close to developing countries. It is critically important for ensuring food security, alleviating poverty and conserving the vital natural resources that the worlds prese nt and succeeding(a) generations will be entirely dependent upon for their survival and well-being (Rothschild, 1998). Use of chemic fertilizers alone does not sustain productivity under continuous intense educateping, whereas inclusion of organic materials improves carnal soil properties (Benbi et al., 1998), builds up soil fetidness and increases crop yield (Yaduvanshi, 2003). Continuous usage of inorganic fertilizer affects soil structure. Hence, organic spreads can serve as alternative to mineral fertilizers as reported by Naeem et al. (2006) for improving soil structure (Dauda et al., 2008) and microbial biomass (Suresh et al., 2004).Wheat (Triticum aestivum) is one of the most important cereal crops about 21% of the worlds food depends on the wheat crop, which grows on 200 million hectares of farmland worldwide (http//www.fao.org). The synthetic fertilizers are harmful for soil and aerial environment, because the inorganic fertilizers mainly contain major nutrients NP K in large quantities and are neglecting the use of organic manures and biofertilizers and hence have paved the way for deterioration of soil health and in turn ill-effects on plants, human being and livestock (Choudhry, 2005). Most of the soil applied fertilizers (nitrogenous), leach down below the root zone or into the design water, which pollute the ground water causing diseases mainly Methemoglobinemia (Choudhry, 2005).As the world water supply is declining, drought is also threatening the world food security. Drought-induced yield losses by chance exceed the loss from all other causes, as both severity and duration of stress are critical (Farooq et al., 2009a). Drought stress reduces crop growth rate and yield regardless of the growth stage at which it occurs in arable crops (Siddique et al., 2000 Atteya, 2003).The efficient and sustainable cycling of nutrients in an agro-ecosystem can improve crop performance, simply achieving this goal is an important challenge for modern agriculture (Cassman, 1999). In order to develop the high intensive agriculture, more chemic fertilizers are applied to the soil that results in soil degeneration and environment deterioration. Application of organic manure have with chemical fertilizer is an important approach to maintaining and improving the soil fertility, and increasing fertilizer use efficiency. Hence it is very useful to study the effect of industry of organic manure combine with chemical fertilizer on the nutrient absorption, soil fertility change, and reduction of fertilizer loss, which have been the research focuses all over the world (Reganold, 1995 Conacher J and Conacher A, 1998 Liu et al., 1996).Application of organic manure combined with chemical fertilizer could maintain the soil nutrients balance amend soil physiological and chemical properties, increase the soil organic result and nutrient availability, precipitate fertilizer loss rate, and then enhance soil fertility and ecosystem productivi ty (Conacher J and Conacher A, 1998 Zhou and Yang, 1992 He and Wang, 1989). Though role of farmyard manure integrated with inorganic fertilizers under drought stress condition in wheat need to be explored according to present need of sustainable farming system. It is hypothesized that integrated nutrients performance of farmyard manure and inorganic nutrients may help improve resistance in wheat against drought and increase yield.V. REVIEW OF LITERATURECereals are an important dietetic protein source throughout the world, because they constitute the main protein and energy supply in most countries (Bos et al., 2005). Wheat is one of the major cereal crops with a unique protein, which is consumed by humans and is grown around the world in diverse environments. Wheat is the worlds second most important cereal crop and an important component of the human diet, particularly in developing countries (Salekdeh Komatsu, 2007). The use of chemical fertilizers has been increased worldwide f or cereal production (Abril et al., 2007) due to availability of inexpensive fertilizers (Graham and Vance, 2000). The continued use of chemical fertilizers causes health and environmental hazards such as ground and surface water pollution by nitrate leaching (Pimentel, 1996). So, reducing the amount of nitrogen fertilizers applied to the field without a nitrogen deficiency will be the main challenge in field management.The primary function of soil productivity and fertility restoration through fallow is less effective since intensive cropping is now more common. The use of inorganic fertilizers alone has not been helpful under intensive agriculture because it aggravates soil degradation (Sharma and Mittra, 1991. It is well known that soil fertility is usually reected by the status of soil nutrients and water together in an integrated system (Zheng et al., 2002). The quantity of soil organic matter depends on the quantity of organic material which can be introduced into the soil eit her by natural returns through roots, stubbles, sloughed-off root nodules and root exudates or by artificial performance in the form of organic manure which can otherwise be called organic fertilizer (Agboola and Omueti, 1982).In the current scenario of water scarcity, droughts during the main cropping season in tropical and subtropical regions are thought to become more presumable in the near future, and will have dangerous effects on human societies ( kick back et al., 2008, Lobell et al., 2008). The drop in precipitation of up to 10% in southernmost Asia by 2030, accompanied by decreases in rice and wheat yields of about 5% (Lobell et al., 2008). In a recent meeting at Stanford University, a chemical group of experts including crop scientists from seed companies concluded as part of their recommendations that particularly for managing moisture stress in rain-fed systems, agronomy may well offer even great potential benets than improved crop varieties (Lobell, 2009). Decits of soil water often have substantially negative impacts on the growth and development of major crops such as spring wheat (Lecoeur and Sinclair, 1996 Asseng et al., 1998). However, crop yields are not necessarily decreased with a moderate level of water decit under irrigation conditions (Zhang et al., 1998).Addition of farmyard manure with fractional the recommended mineral N produced wheat yield similar to that produced by the full recommended dose of mineral N (Ahmad et al., 2002). Cultivation with and without organic and inorganic sources of nutrients applied differently for a long period may have an impact on the regeneration and rejuvenation of soil structure (Sharma and Bhushan, 2001). Increased utilization of organic soil amendments as a nutrient source for plant production would therefore deliver both agronomic and environmental benets (Stockdale et al., 2002). Wheat grains have lower protein subject matter (Gooding et al., 1993 Poutala et al., 1994 Woese et al., 1997) an d a smaller loaf volume (Dlouhy, 1981) for bread made from organically grown wheat compared with conventionally grown wheat. The application of farmyard manure meets N need provides micronutrients and modifies soil physical behavior (Larson and Clapp, 1984) and thus favours wheat production. Moreover, use of farmyard manure not only acts as a source of N and other nutrients but also increases the efficiency of applied nitrogen (Sarvanan et al., 1987).Organic matter determines the fertility and nutrient status of a soil. Most of the tropical and sub-tropical regions including Pakistan are deficient in organic matter. The maintenance of soil organic matter around 2.5 to 3.0 % is desirable for satisfactory crop production. A good soil should have organic matter content of about 2.5% (BARC 1997). Use of judicious combination of organic and inorganic fertilizer is very important for tropical country (Khan et al., 1986) like Pakistan this will at last economize fertilizer use and mainta in soil productivity and grain quality.Positive effects of organic waste on soil structure, aggregate constancy and water holding capacity were reported in several studies (Jedidi et al., 2004 Odlare et al., 2008 Shen and Shen 2001 puff ups et al., 2000). Furthermore, organic manure has a high nutritional value, with high concentrations of especially nitrogen, the Tempter and potassium, while the contamination by heavy metals and other toxic substances are very low (Asghar et al. 2006). Previous studies showed that the combination of organic manure with chemical fertilizer further enhanced the biomass and grain yield of crops (Sarwar et al., 2007 Sarwar et al., 2008 Cheuk et al., 2003). Furthermore, positive changes have been reported in the quality of wheat flour, because of increasing the amount of gluten after organic manure treatment (Gopinath et al., 2008).The above review concludes that organic nutrients (farmyard manure) integrated with inorganic fertilizers may be employe d to increase the yield of wheat and make them ready for future water stress conditions.VI. MATERIALS AND METHODSGeneral detailsThe proposed study will be conducted in Agronomic Research Area, Department of Agronomy, University of Agriculture, Faisalabad. While the analytical work will be done in Agro Climatology lab, Department of Agronomy, University of Agriculture, Faisalabad. The experiment will be laid out in RCBD split plot design with three replications.Well rotten Farm Yard Manure (FYM) will be collected from livestock and dairy Farm, University of Agriculture, Faisalabad while inorganic fertilizer sources Urea , DAP and SOP for Nitrogen, daystar and Potassium respectively will be collected from Agronomy Farm, University of Agriculture.Experiment Growth and Yield of wheat as affected by different levels of integrated nutrients and irrigation.Seed of wheat cultivar Sehar-2006 will be sown in plots (1.5m x 6m) in open field conditions. At sowing time integrated nutrients 50% F YM + 50% Inorganic (NPK) 75% FYM + 25% Inorganic (NPK) 100% FYM 100% Inorganic (NPK) will be applied. The plots maintained at 25mm, 50mm and 75mm water deficit, while recommended dose of both organic and inorganic nutrients applied will be maintained as control. The experiment will be finally harvested at maturity.ObservationsData on following observations will be recorded during the course of experimentation.A. Stand establishment1. quantify to start germination (days)2. Germination index3. Mean germination time (days)4. Time for 50% germination (days)5. Final germination percentage (%)B. Morphological traits1. Plant height (cm)2. Plant fresh weight (g)3. Plant dry weight (g)4. hitch area (cm2)5. Number of tillers6. Total dry matter7. Crop growth rate (g m-2 d-1)8. Leaf growth rate (g m-2 d-1)C. Yield related traits1. Number of plentiful tillers2. Spike length (cm)3. Number of spikelets per spike4. Number of grains per spike5. 100-grains weight (g)6. Biological yield (g/pot)7. G rain yield (g/pot)8. 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