Effect of N and stage of growth on the yield and quality of summer forage crops.

Habib, M. M. and El-Khishen, A. A. and Mekhaeil, G. M. (1971) Effect of N and stage of growth on the yield and quality of summer forage crops. Alexandria Journal of Agricultural Research , 19 (2). pp. 209-215.

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Abstract

In field trials in Sakha and Alexandria in 1967-9, sweet sorghum, Sudan grass, sweet Sudan grass [sorghum x Sudan grass hybrid] and forage maize (1968-9) were given 0, 15, 22.5 or 30 kg N/feddan in 3 split applications, i.e. 21 days after sowing, before the 2nd irrigation and after the 2nd cut. At both sites the highest economic yields and the best quality forage were obtained with 22.5 kg N/feddan. At Sakha in the summer of 1969, sweet sorghum, Sudan grass and sweet Sudan grass yielded 1.25-1.3 t DM/feddan, containing 6.27-6.33% CP and 31.61-31.91% CF, while maize yielded 1.19 t DM/feddan and contained 5.27 and 30.34% CP and CF, respectively. The HCN content was highest in plants 15 days after sowing, and thereafter it decreased. After 15 days the 3 Sorghum spp. contained an average of 12.27 mg HCN/100 g DM compared with 3.32 mg in maize. Sudan grass had a significantly higher HCN content than the other 2 Sorghum spp. After 45 days the average HCN content of maize was 0.059 mg/100 g DM, while that of the Sorghum cv. after 60 days was 0.428 mg. Sorghum spp. exhibited a 2nd increase in HCN content after the 1st cut followed by a gradual decrease. It was concluded that the amount of fresh forage consumed by animals would not contain toxic levels of HCN. [1 feddan = 1.038 ha].

Item Type:	Article
Author Affiliation:	Faculty of Agriculture, Alexandria University, Arab Republic of Egypt.
Subjects:	Plant Production Crop Improvement
Divisions:	General
Depositing User:	Siva Shankar
Date Deposited:	28 Oct 2010 06:27
Last Modified:	28 Oct 2010 06:27
URI:	http://eprints.icrisat.ac.in/id/eprint/361

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