Developing short-season cotton genotypes with high harvest index might be an advantageous option under late duration plantings

Abstract

Short duration cotton (Gossypium hirsutum L.) cultivar may be more profitable for the growers, as it will have shortened critical growth window for drought, heat and insect pests. Therefore, in the present research work, two cotton advance lines IUB-71 and IUB-73 along with an approved cotton cultivar IUB-13 were tested under four different sowing dates i.e. S1 (25th April), S2 (10th May), S3 (25th May) and S4 (10th June) in 2017 and 2018 under field condition. Field layout was RCBD factorial with four sowing dates as one factor and three cotton genotypes as another factor with three replications. Data were recorded for plant height, total number of nodes, bolls per plant, seed cotton yield (SCY), above ground fresh biomass (AGFB) and harvest index (HI). An overall decreasing trend with increasing sowing dates was observed in all the traits except HI that relatively increased in all the three genotypes. Within each sowing date, a higher value for each trait was observed for genotype IUB-73 except for AGFB might be due to higher reproductive allocation. It is concluded that IUB-73 due to superior SCY and HI specifically under late planting is best fit for short cotton seasons with reduced critical window for cotton management.

Delayed harvest time affects strength and color parameters in cotton fibers

“…Considering the climatic differences between seasons, the higher SCY and LY obtained in S2 than in S1 could be associated with higher rates of solar radiation during the main growing months (December–February), proper minimum and maximum temperatures, and balanced rainfall distribution in S2 compared to S1. In agreement, several authors have associated larger yields with higher rates of solar radiation, rainfall, or temperature regimen during the growing periods (Conaty & Constable, 2020; Iqbal et al., 2020; Pettigrew et al., 2013). On the other hand, among all the quality parameters assessed, the statistical analysis showed significant differences in UHML, UI, Mic, and Rd between seasons, whereas Mic and Rd also presented differences among cultivars.…”

Estimation of Cotton Nutrient Uptake Based on the QUEFTS Model in Xinjiang

“…The differences in the inputs of N, P, and K might be due to the diversity of potential yields at the different experimental sites. However, overfertilization and high soil nutrient availability led to an increasing rate of higher RIEs with lower yields, confirming the presence of luxury consumption throughout the cotton growth cycle [51]. Soil nutrient conditions, plant nutrient demands, and the interactions between N, P, and K must be taken into consideration when proposing a fertilizer recommendation [41].…”

“…A prerequisite for using the database was a dataset where crop growth was not subjected to limitations other than in N, P, or K supply [19]. Harvest index (HI) is a complex trait signifying the balance of genetic and environmental factors leading to improved yield [51]. The harvest index (HI) for the entire cotton database ranged from 0.21 to 0.59, with an average value of 0.40, which was less than grain crops [21,28] and similar to oil rapeseed and soybean [35,52].…”