Biotechnical Potential of Paspalum Submitted to Simple Superphosphate Doses and Moisture Content

Abstract

-The objective of this study was to evaluate the development of grass Paspalum millegrana Schrad propagated through seeds and tillers, subjected to different levels of water and phosphorus to be used in erosion control on slopes. The experimental trial was conducted in greenhouse with propagation of tillers and seeds of Paspalum grass, at the Federal University of Sergipe, São Cristóvão, Brazil. The design was the completely randomized design with sixteen treatments and four replications, arranged in a factorial scheme corresponding to (0, 100, 200, 300 and 400 mg kg -1 ), two water contents in the soil (60% and 100% of total pore volume) filled with water and two types of propagation (tillers and seeds). Plants were harvested at the end of four months of conducting the experiment and evaluated the following variables: number of tillers (NT), number of inflorescences (NI), Shoot Length (SL), Root Length (RL), Shoot Dry Weight (SDW) and Root Dry Weight (RDW). The phosphorus and water levels interacted positively with the variables studied and showed that this grass, presented biotech important features like good tillering, and the consequent formation of dense aerial biomass and root required for slope protection against erosion. The specie Paspalum millegrana showed a better development among the variables analyzed under conditions of less water availability with 60% VTP and the best responses of the simple superphosphate dosages were between 200 and 300 mg kg -1 .

EXOTIC ARBUSCULAR MYCORRHIZAL FUNGI AND NATIVE DARK SEPTATE ENDOPHYTES ON THE INITIAL GROWTH OF Paspalum millegrana GRASS

“…Thus, the presence of vesicles may be influenced by the environment, and also by hostplant interaction. In general, the greater the number of arbuscules in the spring/summer in P. millegrana grass, the better the nutrients availability, such as nitrogen and phosphorus, promoting the plants growth and development, mainly in low fertility soils in the cultivated regions of this species in Sergipe state (HOLANDA et al, 2017).…”

“…Regarding tiller emergence, Cavagnaro et al (2014) observed that P. dilatatum inoculated with Glomus mixture did not increase tiller emergence, as observed in P. millegrana cultivated with UFLAs isolates belonging to the genera Gigaspora, Rhizoglomus, Claroideoglomus and Acaulospora. Holanda et al (2017) reported that tiller emergence of P. millegrana was inversely correlated to the amount of water available in the soil. These authors, also concluded that the high biomass grass reduce soil water and stimulates tiller formation, perhaps as a survival strategy.…”

“…P. millegrana grass cultivated with exotic AMF isolates have thin roots, as the vetiver grass (SANTOS et al, 2018a), which offers advantages in reducing soil erosion (MACHADO et al, 2015). The colonization of P. millegrana grass by exotic AMF may be important in studies, especially those of slope stabilization as performed by Holanda et al (2017). However, soil erosion control by plants such as P. millegrana is remarkable and should be more investigated.…”

“…In the Lower São Francisco region, Paspalum millegrana grass, a native species in the Americas, has been used to stabilize slopes because of its high plant biomass and fine roots, improving soil shear strength and soil particles aggregation (HOLANDA et al, 2017;MACHADO et al, 2015;HOLANDA;ROCHA;OLIVEIRA, 2008;OLIVEIRA et al, 2013).…”

Development and Morphometric Characteristics of Vetiver Grass Under Different Doses of Organic Fertilizer

“…Different organic compounds have been investigated regarding their role as organic phosphorus slow-release fertilizers (MAJEE; HALDER; MANDAL, 2019). Phosphorus is a macronutrient present in the soil and stimulating the growth of the absorption area of the root system, consequently stimulating plant growth (HOLANDA et al, 2017). Phosphorus deficiency in grasses such as vetiver causes a decrease in the transport of assimilates, which may negatively affect the photosynthetic rate, directly affecting the removal of carbon dioxide from the atmosphere (MIRANDA- VILLAGOMEZ et al, 2019), factors that can change the full performance of vetiver.…”