Genotype and Planting Density Effects on Rooting Traits and Yield in Cotton (Gossypium hirsutum L.)

摘要: Root density distribution of plants is a major indicator competition between and determines resource capture from the soil. This experiment was conducted in 2005 at Anyang, located Yellow River region, Henan Province, China. Three cotton (Gossypium hirsutum L.) cultivars were chosen: hybrid Bt-cultivar CRI46, conventional Bt-cultivars CRI44 CRI45. Six planting densities designed, ranging 1.5 to 12.0 plants/m2Root parameters such as surface area, diameter length analyzed by using DT-SCAN image analysis method. The root (RLD), average area index (RAI), per unit land studied. results showed that RLD RAI differed genotypes; CRI46 had significantly higher (P < 0.05) values than cultivars, especially under low densities, less 3.0 plants/m2The (RAI) 61% CRI45 flowering stage. also different (P= 0.000) densities. depth increasing increasingly distributed soil layers below 50 cm. for all obviously other during boll stages. It concluded strong advantage maintenance preventing premature senescence roots. genetically lower 6.0 plants/m2Good associations found yield optimum ranged 4.50 plants/m2 6.75 around 4.0–5.0 hybrids. (Managing editor: Ya-Qin Han)