Acúmulo de massa seca e nutrientes pelo tomateiro 'SM-16' cultivado em solo com diferentes coberturas

Abstract

Dry mass and nutrients accumulation by tomato 'SM-16' cultivated in different mulchingThe dry mass and nutrients accumulation by tomato 'SM-16' cultivated in different mulching was carried out on an experiment in WG Fruticultura, Baraúna, Rio Grande do Norte state, Brazil, from September 2009 to January 2010. The treatments consisted of 1) uncovered soil, 2) black polyethylene film, 3) white polyethylene film, 4) gray polyethylene film and 5) black polypropylene (TNT). Treatments were arranged in split plots with the plots represented by mulching and split plots by the time of sampling the plants: 14, 28, 42, 56, 70, 84, 98 and 112 days after transplanting. The experimental design utilized was a randomized complete block with four replications. Mulching did not affect the dry mass accumulation of the plants. The fruits behaved as preferential sink of the plant, reaching the end of the cycle with 48.6% of the total accumulated dry mass. Only N, Ca and Mg accumulation in the fruits and K accumulation in the leaves were influenced by mulching. Using white polyethylene resulted in the highest averages, respectively in the accumulation of 137.73 and 8.84 kg/ha of N and Mg on fruits. Using TNT resulted in the accumulation of 4.02 and 134.23 kg/ha of Ca and K on fruits and leaves, respectively. The nutrients accumulation in the plants in decreasing order were K>N>Ca>Mg>P; N, P and K being found in higher quantities in fruits, and Ca and Mg in leaves.

Organic compost addition to raw rice husk substrate for tomato (<i>Solanum lycopersicum</i>) hybrid variety cultivation in a leach recirculating system

“…Nevertheless, the varieties did not differ in LAI, total plant DM production or proportional DM partitioning for fruits. The fruits accounted for 58-64% of DM produced by the shoot, coinciding with the results previously obtained for other beefsteak tomato varieties Aguirre et al, 2012;Lucena et al, 2013;Soares et al, 2013). The fruits can be considered as the most powerful photoassimilate sink.…”

Nutrient uptake in sesame cultivars under cultivation in semiarid conditions

“…Plant dry matter accumulation was slow to 49 days, expanding later for all cultivars. The initial slow growth is due to the great spend of energy for fixation in the ground, where the roots are the preferred drain of photoassimilates (LUCENA et al, 2013). The estim ated maximum uptake for Growing Season I was 104.27 g plant -1 (CNPA G2), obtained at 93 DAS; 145.66 (CNPA G3) and 145.81 g plant -1 (CNPA G4), both at 105 DAS ( Figure 1A, 1C and 1E).…”

Plant growth and nutrient accumulation in two tomato hybrids under tropical conditions

“…Such information is important, especially for short-cycle crops and intensive fertilisation, as for the tomato (Omaña and Peña, 2015). Pioneer studies in Brazil by Gargantini and Blanco (1963), Fernandes et al (1975), and Haag et al (1978); subsequent studies by Fayad et al (2002), Rodrigues et al (2002), Prado et al (2011, and Lucena et al (2013); and a more recent study by Purquerio et al (2016) have all reported differences in the quantities of nutrients absorbed and in yield. Such differences can be due to the genotypic variations of each cultivar, including its typology, to variations in growing conditions, and mainly to mass production (Haag and Minami, 1988).…”