Paper Information

Journal:   PAJOUHESH-VA-SAZANDEGI   SUMMER 2007 , Volume 20 , Number 2 (75 IN AGRONOMY AND HORTICULTURE); Page(s) 59 To 67.
 
Paper:  EFFECTS OF PLANT DENSITY ON QUANTITATIVE AND QUALITATIVE CHARACTERISTICS OF FORAGE SORGHUM IN SECOND CROPPING
 
Author(s):  KHALILI MAHALEH J.*, TAJBAKHSH M., FAYAZ MOGHADAM A., SIADATI A.A.
 
* ISLAMIC AZAD UNIVERSITY BRARCH KHOY
 
Abstract: 

In order to study the effect of plant density on forage yield & quality of forage sorghum 3 year research (2002-2003 and 2004) was conducted at Khoy research station. Experiment was carried out using a split plot design, used on RCBD with 4 replications. The density of 200,250,300 and 350 thousand plant per hectare was considered as main factor levels. the hybrides of speedfeed, sugergraze and Jumbo as sub factor levels. Sowing date was 11 July in even years. investigate charactrestics were plant height T stem diameterT leaf number and tiller number per plant T leaf to stem ratio, fresh fodder and dry matter yield in first cutting, crud protein and ash percent in first cutting and dry matter in second cutting. the harvest was in 10 percent of anthesis. The result of compound analysis of variances showed that an increase in Plant density on the surface unit leads to the reduction stem diameter and tillers. but it could maximing plant height and LAI. The highest fresh fodder, dry matter and leaf to stem ratio obtained in 350000 plant per hectar. plant density had any honestry effect on ash and protein percentage. The maximum dry matter and fresh fodder by 14.99 and 69.69 ton per hectar obtained in speed feed hybride. in this manner the highest dry matter in first and second cutting, fresh fodder, plant height, stem diameter, tiller number and protein percentage were obtained in speedfeed and this hybrid had a superiority to 2 others. sugargraze hybride had the highest rate of %ash. Ultimately, plantation of speed feed forage Sorghum with 350000 plant density as the second cropping was recommended to Khoy farmers.

 
Keyword(s): FORAGE SORGHUM, PLANT DENSITY, YIELD, QUALITY
 
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