However, the rate of mineralization is controlled by several factors, including agricultural management, microorganism, soil properties, temperature, and water content [ 456 ], as well as the type of organic fertilizer [ 7 ].
Crop and Environment, 2, Table 1 Effects of different nitrogen fertilizer treatments on soil properties. Pakistan Journal of Agronomy, 1, In Pakistan, national average yield of maize is extremely below as compared to other developed countries, and imbalanced supply of nutrients is considered as one of the major cause of yield reduction.
It may be due to prolonged vegetative growth which increased the plants height. Similar results were obtained by Ghulam et al.
Phosphorus is essential for inflorescence, grain formation; ripening and reproductive parts of maize plant Ibrahim and Kandil . Phosphorus in adequate amount is necessary for earlier maturity, rapid growth and improves the quality of vegetative growth.
Plant Height cm Plant height for all the treatments in each replication were measured with the help of a measuring tape from the base to tip of the five randomly selected plants and then average plant height was calculated. Similar results were obtained by Onasanya and Zaman Khan et al.
Statistical Analysis Analyses of variance were performed with all data to confirm variability of data and validity of results. Excess nitrogen is lost in ionic or gaseous form through leaching, volatilization, and denitrification [ 19 ].
Materials and Methods 2. Green leafy vegetables contain the highest nitrate levels [ 21 ], and lettuce is classified as having very high nitrate content [ 22 ]. Many models have been developed to predict the release of nitrogen in applied organic fertilizers [ 68 ]. Seven nitrogen fertilization treatments were compared with three replicates, including the following: Conclusion In crux, of the factors included in this study, maize cultivars and NP fertilization treatments were dominant in determining grain yield as well as its related components, suggesting that cultivar selection and optimum fertilization are effective strategies to improve grain yield.
Inorganic and organic fertilizers are applied to maintain the nutritional condition of different cropping systems. The intensive cropping system where nutrients are utilized in huge quantity which changes soil texture and structure alters the availability of nitrogen and phosphorus and it directly affects yield of any crop.
Grain legume crops has an advantage over non legume grain crops that root nodules fix atmospheric nitrogen N for plant use and the plant and root residues contribute to soil nitrogen for the following crop.
The maximum yield may be due to the greater contribution of nitrogen for producing bold and robust grains and hence more weight. The seedling were counted and averaged. These findings are in agreement with those of Bakhtand Ghulam et al.
Results and Discussion 3. Similar results were obtained by Ghulam et al. Thousand grains weight g of maize varieties as affected by N and P levels. Maximum silking 57 was recorded in case of Jalal with fertilizer treatmentN: The total nitrogen concentration in the filtrate of the plants and soils passed through filter papers Whatman No.
When too much nitrogen is applied, excess vegetative growth occurs, and the plant lodges with slightest wind.
Once organic fertilizers are applied to soils and mineralization begins, inorganic nitrogen is released and absorbed by plants. In Pakistan, it is grown on an area of 9. The amount of N fixed by grain legumes can vary by crop, residual soil N levels, plant growth, management practices and climatic conditions.
Thousand grains weight g of maize varieties as affected by N and P levels. Sarhad Journal of Agriculture, 23, Minimum number 6 was also recorded in Jalal which was A mixture of soil and different types of fertilizer 4. Maximum grains weight of g of Jalal variety was recorded in those plots treated withN: The total nitrogen concentration in the filtrate of the plants and soils passed through filter papers Whatman No.
Nitrogen, a plant nutrient is required by plants in comparatively larger amounts than other elements. This may be due to increased root growth, which strengthened the stem against lodging during prolonged vegetative growth. Optimizing the NPK fertilizer doses is necessary to achieve optimal yield potential of a cultivar.ABSTRACT.
An experiment was conducted at Malakabad (Gadera) Dargai Malak and KPK to study the effect of different levels of nitrogen and phosphorus on the yield of maize varieties in randomize complete block design with split plot arrangement.
Effect of Different Levels of Nitrogen and Phosphorus on the Phenology and Yield of Maize Varieties Fahad Khan1*, Sehrish Khan2, Shah Fahad1, Shah Faisal3, Saddam Hussain1, Saqib Ali4, Ashfaq Ali5 1College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.
Figure 1: Effect of different levels of Nitrogen and Humic Acid levels on plant height of gladiolus varieties. LSD value for plant height at alpha = Means followed by different letters are significantly different at 5% level of significance.
ABSTRACT. An experiment was conducted at Malakabad (Gadera) Dargai Malak and KPK to study the effect of different levels of nitrogen and phosphorus on the yield of maize varieties in randomize complete block design with split plot arrangement. Apr 22, · Nitrogen is an essential element for plant growth and development; however, due to environmental pollution, high nitrate concentrations accumulate in the edible parts of these leafy vegetables, particularly if excessive nitrogen fertilizer has been applied.
Effect of different levels of nitrogen, phosphorus, and potassium on root activity and chlorophyll content in leaves of Brassica oleracea seedlings grown in vegetable nursery substrate.Download