PJB-2018-595
Effects of press-formed crop residue rice seedling tray on the physiological characteristics of machine-transplanted rice seedlings
Ren Lantian, Hao Bing, Zhang Xiang, Shao Qing Qin, Sun Shanjun, Huang Shoucheng, Wang Hong, Yang Li and Zhang Congjun
Abstract
This study aims to analyze the intrinsic relationship between substrate type and the physiological characteristics of seedlings. It also aims to evaluate the applicability and universality of seedling substrates. Natural soil (CK) and a commercial mixed substrate (T1) were used as controls, while bulk straw substrate (T2) and straw seedling board substrate (T3) were taken as research objects. The effects of straw seedling substrate, specifically plate straw seedlings without a plastic plate, on the growth characteristics and seedling quality of rice seedlings were studied. Results showed that the bulk densities of the T2 and T3 were significantly lower than those of the control by 74.11% and 59.82%, respectively (p<0.05). Aeration pores, water holding pores, and nutrient contents were significantly higher in the test groups than in the controls (p<0.05), and the raising process was simple. The growth characteristics of seedlings and roots grown in T2 and T3 were significantly better than those of the control treatment (p<0.05). Roots were agglomerated and the leaf age, plant height, amount of dry matter in the above-ground parts, and stem base width of the test groups were significantly higher in the test groups than in the control treatment. The physiological indicators of the seedlings suggested that the respective SOD and POD contents of seedlings raised in T3 were 40.80% and 16.76% higher than those of seedlings raised in T1. However, the MDA content of this group was lower than that of the control, which indicates that T3 improves the stress resistance of rice. The binding ability and contents of total nitrogen, soluble sugar, starch, and chlorophyll of the T3 and T2 were higher than those of CK and T1. The findings suggest that seedlings raised in the straw seedling substrates have strong growth potential, which is conducive to their growth in the field after machine transplantation, and lays a solid foundation for research on high-yield agriculture.
To Cite this article:
Lantian, R., H. Bing, Z. Xiang, S.Q. Qin, S. Shanjun, H. Shoucheng, W. Hong, Y. Li and Z. Congjun. 2020. Effects of press-formed crop residue rice seedling tray on the physiological characteristics of machine-transplanted rice seedlings. Pak. J. Bot., 52(5): DOI: http://dx.doi.org/10.30848/PJB2020-5(9)
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