Response of Cotton Growth and Yield to Planting Space, Levels and Partition of Nitrogen Fertilizer Application

Saleh M. Ibraheem, Amjad T. Khalil


A field experiment was conducted in two Locations to investigate the response of Upland cotton (Gossypium hisutum L) cultivar (Lachata) growth and yield to planting space, partition and levels of nitrogen fertilizer application. The experiment was carried out in. R.C.B.D using split-split plot with three replications. The experiment included two planting spaces ( 60 and 75cm) between two partitions of nitrogen fertilizer application ( a- half quantity applied at thinning and second half at blooming, and b- one third quantity applied at thinning and one thirds at blooming) and four levels of nitrogen fertilizers ( 0 , 108 , 216, and 324 kg N/ ha). The results indicate that the planting spacing 60 cm was significantly increased stem dry matter and total cotton in both location leaf surface area index in Tellafar locations, while planting space 75cm was significantly increased leaf area and relative growth rate of leaves in Rahmanya locations. Concerning partition on nitrogen, the first partition was significantly for stem dry matter, relative growth rate of stem and leaf area index in Tellafar location ,and second partition for number of boll per plant and total plant yield in Rahmanya location. Significant differences were observed between the applied nitrogen levels at all investigated traits in both locations except for specific density of leaves in Tellafar location and relative growth rate of stem in Al-Rahmanya location.


Planting Space, Partition of Nitrogen Fertilizer Application, Levels of Nitrogen Fertilizers, Cotton, Relative Growth Rate.

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