Effect of Sources and Rates of Nitrogen Fertilizers on Forage Yield and Nitrate Accumulation for Sudangrass

Abstract

AFIelD experiment was carried out at the experimental Station Farm in Giza, Agricultural Research Center, egypt, during the two successive summer seasons of 2012 and 2013. The experiment was to study the effect of varying sources, rates of nitrogen fertilizers on fresh and dry forage yields of sudangrass, chemical constituents, nitrate and nitrite accumulation in plant using a split-plot design with three replicates . The main plots were assigned to nitrogen fertilizer sources (Ammonium nitrate NH4 NO3 and ammonium sulphate (NH4)2 SO4.While, the sub-plots were occupied with rates of nitrogen fertilizer (50, 75, 100, and 125 Kg N / fed).The results indicated that the fresh and dry forage yield ton/fed, nitrogen, crude protein, phosphorus, potassium, nitrite (NO2) and nitrate (NO3)contents were significantly decreased in the second cutting as compared with the first one over both seasons. Using ammonium sulphate "(NH 4 ) 2 SO 4 " was better than using ammonium nitrate "NH4 NO3" as a source of nitrogen fertilizer over both cuttings and seasons.Fresh and dry forage yields of sudangrass were significantly increased as nitrogen rates increased from 50 to 75 and 100 kg N/fed and significantly decreased due to increasing nitrogen rate from 100 to 125 kg N/ fed over both seasons.It can be recommended that mineral fertilizing of sudangrass plants with 75100-kg N/fed is better to get suitable forage yields and reduce nitrate accumulation in plant.

Optimizing Productivity of Buffel and Sudan Grasses Using Optimal Nitrogen Fertilizer Application under Arid Conditions

“…Further, this study established that the number of leaves per plant increase with increasing nitrogen rates, with Sudan grass having more leaves than Buffel grass. This implies that nitrogen fertilizer treatment for both types of grass ensured more leaves for making foliage for animal feeds [14]. These results agree with those of Mrid et al [20] and Wang et al [47], who reported that photosynthetic activities, leaf chlorophyll content, and other leaf attributes of maize crops improve under nitrogen fertilization.…”

“…Sudan grass produced more forage yield compared to Buffel grass, this is because of the greater tiller number and number of leaves produced by Sudan grass than Buffel grass [1,14]. Moreover, the higher forage yield observed in Sudan grass was also attributed to the fact that the dry matter in the shoot was more than that in Buffel, making Sudan grass a better feed for animals due to its higher quality [52,53].…”

“…It is a suitable forage crop for cultivation under irrigation systems in arid and semi-arid regions [13]. Sudan grass has several dependable characteristics, which include drought and heat tolerance, high-yielding potential, excellent water use efficiency, less susceptibility to diseases, and a high response to nitrogen fertilization [14].…”

Nitrogen efficiency in marandupalisadegrass pastures under increasing nitrogen levels

“…Few studies have evaluated the use of ammonium nitrate, in the fertilization of the pastoral ecosystem. It has already been published research with ammonium nitrate fertilization in pastures of Coastcross (Cynodon dactylon;SILVEIRA et al, 2007;PRIMAVESI et al, 2006), Pensacola (Paspalum notatum Flügge; SILVEIRA et al, 2015), Sudan grass (Sudanese Sorghum; ABO-ZEID et al, 2017), Tifton 85 (Cynodon spp. ;BORGES et al, 2017).…”

Alleviation of Salinity Stress Effects in Forage Cowpea (Vigna unguiculata L.) by Bradyrhizobium sp. Inoculation

“…On the other hand, animal production is suffering scarcity, due to the competition between the production of human food and animal feed. Thus, legumes forage crops can be grown in the newly reclaimed soil and irrigated by saline water [5]. Like most legumes species, forage cowpea (Vigna unguiculata cv.…”