Evaluation of Quantitative and Qualitative Traits of Forage Sorghum and Lima Bean under Different Nitrogen Fertilizer Regimes in Additive - Replacement Series

Abstract

In order to study the effect of intercropping on forage yield of Sorghum and yield components of lima bean at different planting proportions and nitrogen fertilizer levels, an experiment was conducted at the research farm of University of Tehran in the year of 2009. Quantitative attributes such as dry weights of sorghum, yield and yield component of lima bean were measured in two sampling during growth season. The highest fresh and dry weight of sorghum fodder belonged to additive proportions of sorghum. Nitrogen application treatments had significant effect on sorghum total dry matter of fodder (160 urea Kgha -1 ) and total yield of lima bean (80 urea Kgha -1 ) seed. Evaluation of Land Equivalent Ratio (LER) indicated that the highest LER obtained in the combination of 100% sorghum and 20% lima bean which indicates the advantage of intercropping (LER=1.26).

Effect of Intercropping Cowpea ( Vigna unguiculata L.) with Teosinte ( Zea mexicana Schrad ) on Forage Yield Productivity and Its Quality

“…Data revealed that the highest value for K was achieved when cowpea was intercropped by 50% with teosinte+75% of cowpea seeding rate of its pure stand under 2:2 intercropping patterns (3.89 and 4.89) in the first and second seasons, respectively, and opposite, the lowest value for K was showed with 50% +50% seed rate for both crops and intercropping cowpea on the other side of teosinte ridges. Similar results were obtained by Abd EL-Shafy et al (2009) and Reza (2012)…”

“…This result may be due to increase cowpea seeding rate from 50% to 75% increased % of CP and DCP % beside of reduce CF% in dry forage yield because of cowpea more riches in CP content as shown at cowpea pure stand. Similar results were accorded with Eskadari (2012) and Reza (2012) for CP %, Maurice et al (2010) and Zeidan et al (2003) for DCP % as well as Abd EL-Shafy et al (2009) for CF %. Table 4 indicated that the interaction between factors under study significantly affected on three cuts and its averages of CP %, DCP % and CF % in 2 nd season only.…”

“…However plants at the 3 rd cut growing period tended to initiate flowering and the more warm environmental conditions at that period of growth cause and extra expenditure of energy in flowering and seed initiation as well as for respiration of plants rather than in vegetative growth (Abd EL-Shafy et al, 2009). Similar results Sarhan & Attia (2000), Riza (2012) for fresh forage yield; and Dahmardeh et al (2009) and Reza (2012) for dry forage yield.…”

“…Eskadari (2012) reported that the intercropping was attributed to higher forage production by intercrops and also protein content. Reza (2012) indicated that the crude protein and dry matter yields of sorghum (Sorghum bicolor L. Moench) increased with legumes compared with sorghum monoculture. Abraha (2013) found that the higher Land equivalent ratio (LER) was obtained from cowpea intercrops (1.71) which indicates the intercropping of maize-cowpea was advantageous than mono crop maize.…”

Impact of organic and inorganic fertilizers on the yield and quality of silage corn intercropped with soybean

“…N contributes greatly to the synthesis of amino acids and ultimately proteins; the greater the available N to crops is; the greater the protein that can be synthesized. High levels of CP as a result of NPK applications, which leads to increased protein synthesis, have been reported in sorghum-lima bean forage (Zandvakili et al, 2012) and forage amaranth production (Abbasi, Rouzbehan & Rezaei, 2012). …”