Productivity and grain size of coffee grown in different weed management systems

Acta Scientiarum: Agronomy

Ursula RamosZaidan¹  Renata Cássia Campos²  Wendel Magno deSouza²  Ricardo Henrique SilvaSantos²  Rodrigo MagalhãesFaria²  Francisco Cláudio Lopes deFreitas²  Iasmine RamosZaidan³ 

[1] Universidade Federal de Goiás;Universidade Federal de Viçosa;Universidade Federal do Espírito Santo;

关键词: coffee grain yield;    granulometry;    split-split plot analysis;    path analysis;    causality;    coffee bienniality;   

DOI  :  10.4025/actasciagron.v44i1.55692

来源: DOAJ

【 摘 要 】

Intensive weed management is one of the most common practices in coffee cultivation areas. Consequently, some problems, such as soil degradation and the selection of herbicide resistant weed, have increased over time, but, if properly managed, weeds at coffee planting inter-rows can offer benefits of erosion control, nutrient recycling and crop sustainability. The aim of this study is to evaluate the effect of different weed management strategies on the productivity and coffee grain size, i.e., quality. The experiment is installed onto a resprouting Coffea arabica L. site, four years after it was established. Treatments are implanted at planting inter-row Urochloa ruziziensis, Pueraria phaseoloides, and spontaneous vegetation maintained by mowing, herbicides, and weeding. To measure dry matter accumulation, samples are taken with a 0.25 m2 square template at plots maintained by mowing and herbicide application. To evaluate the yield and granulometry, coffee fruits are harvested, processed and classified in a set of 14 sieves (grouped in flat or “moca” shapes). The methods of controlling herbicide and weeding show significance in relation to grain production, with the production of grains having a higher market value standing out, when compared with the other treatments. The accumulation of dry matter above soil, in treatments with herbicides and spontaneous vegetation positively influenced the early coffee productivity (2018), and with U. ruziziensis and spontaneous vegetation, positively influenced the productivity of late harvest (2019). The accumulation of dry matter on the soil tends to be positively linked to coffee productivity, especially in periods when there is a shortage of rain in the region under study; however, it cannot be stated that this influence relationship (causality) has a direct positive effect between dry matter mass production and productivity of future coffee plantations.

【 授权许可】

Unknown