Effect of Sowing Dates and Varieties of Cotton (Gossypium hirsutum L.) on Growth and Yield Parameters.

Abstract

The sowing date trials comprised of three planting dates on three cotton varieties (Lachata, Stoneville 213 and Coker 310), were conducted to investigate appropriate sowing time of the varieties at Erbil, Kurdistan during 2017. It was also to investigate the effect of climate change of sowing time. Results indicated that sowing dates, varieties and interactions significantly affected all studied characteristics. The highest plant height was recorded of Stoneville 213 which was by (110.8) cm in April 27. Variety Lachata exhibited maximum seed cotton yield (5851.13) kg/ha followed by variety Coker 310 (5097.77) kg/ha on March 28. The different results of mean boll weight, number of seeds per boll, seed index and other parameters were also recorded for varieties and different sowing dates. It was concluded that sowing on March 28 is the most appropriate sowing time for these varieties under agro-climatic condition of Erbil, Kurdistan. Based on the results from this current study some varieties will be growing better in other state of Kurdistan especially in the cold condition.

Straw Mulching and Plant Spacing Enhance Yield and Some Quality Traits of Cotton (Gossypium hirsutum L.) Varieties

“…(Figure 8b). These results in accordance with Salih (2019) investigated that earliest rate of maturity influenced by variety. On the other hand, plastic mulch enhanced rate of maturity (72 %) as compared to no mulch (Dong et al, 2009).…”

“…Maximum and minimum numbers of seeds boll -1 were 27.1 and 25.4, for V2 and V1, respectively (Figure 4a). These results supported by other researchers, such as varieties of cotton as well non-significantly influenced number of seeds boll -1 (Salih, 2019). Akbar et al (2015) found that plant spacing not influenced to number of seeds boll -1 ; plant spacing of (20 and 30) cm had (28.33 and 28.55) seeds boll -1 .…”

“…However, at Ainkawa location all factors and their interaction were non-significantly influenced boll weight as indicated in (Figure 3 a and b). In another research Salih (2019) reported that boll weight non-significantly affected by variety.…”

“…When the plant population of the cotton crop is low affects yield and fiber quality (Nichols et al, 2007;Crews and Peoples, 2005). Saeed et al (2014); Salih (2019) in an investigation showed that different cotton varieties significantly influenced growth and yield with different genotypes. Also, Saleem et al (2010) informed that cotton fiber quality is primarily affected by cultivar genotype, but agronomic techniques and environmental circumstances are minor influences.…”

Influence of different irrigation regimes and planting times on the quality and quantity of calyx, seed oil content and water use efficiency of roselle (Hibiscus sabdariffa L.)

“…Accordingly, flowering abortion would be expected to increase during drought stress as it decreases the flux of photosynthate supply from source leaves to the vegetative tissues. Also, drought stress may change the concentration of ABA in the plants, and thereby induce flower abortion in drought-stressed crops (Salih, 2019).…”