J. Silva, Evair Marcelo Queiroz da Silva, J. C. Nunes, M. A. D. Moura, Juliete Valdevino da Silva, A. A. Souza
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A randomised block experimental design was used, with three replications, in a (5 × 2) + 1 factorial scheme, representing five doses of poultry litter (0, 5, 10, 15 and 20 t ha-1), with sweet potato as both a monocrop and intercropped with sunn hemp, and one additional treatment with organic and mineral fertiliser. Slips of the Granfina variety of sweet potato were used for planting. Seeds of sunn hemp were sown in double rows between the rows of sweet potato 30 days after planting the slips, with the first cutting carried out 90 days after sowing. The addition of poultry litter to the soil increased the total production of sweet potato roots for the crop planted in Roraima, whether intercropped or not with sunn hemp. 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引用次数: 2
摘要
在巴西北部地区,关于甘薯适宜的土壤管理,特别是有机肥和绿肥套作的信息仍处于早期阶段。因此,本研究的目的是评估在罗赖马州的土壤和气候条件下,在单一作物系统和间作大麻(Crotalaria juncea)时,家禽粪便对甘薯根产量的影响。该实验于2014年8月至12月在罗赖马州博阿维斯塔镇UFRR Murupu校区农业技术学院农业部门进行。采用随机区组试验设计,3个重复,采用(5 × 2) + 1因子方案,5个剂量的家禽粪便(0、5、10、15和20 t hm -1),甘薯作为单作,间作大麻,另外使用有机和矿物肥料。种植的是格兰菲纳(Granfina)品种的甘薯片。播种后30天,在地瓜两行之间播种太阳麻种子,播种后90天进行第一次扦插。在罗赖马种植的作物中,无论间作与否,向土壤中添加家禽垃圾都增加了甘薯根的总产量。尽管添加家禽粪便和间作大麻对红薯产量有好处,但额外施用有机和无机肥料的总产能更高。
Yield of sweet potato as a function of organic fertilization and intercropping with Crotalaria juncea
In the northern region of Brazil, information for the sweet potato regarding suitable soil management, especially organic fertilisation and intercropping with species of green manure, are still in the early stages. The aim of this research therefore, was to evaluate the effect of poultry litter on the yield of sweet potato roots grown under a monocrop system and when intercropped with sunn hemp (Crotalaria juncea) under the soil and climate conditions of the State of Roraima. The experiment was carried out in the field from August to December of 2014, in the Sector for Olericulture of the School of Agricultural Technology, on the Murupu Campus of UFRR in the town of Boa Vista, Roraima. A randomised block experimental design was used, with three replications, in a (5 × 2) + 1 factorial scheme, representing five doses of poultry litter (0, 5, 10, 15 and 20 t ha-1), with sweet potato as both a monocrop and intercropped with sunn hemp, and one additional treatment with organic and mineral fertiliser. Slips of the Granfina variety of sweet potato were used for planting. Seeds of sunn hemp were sown in double rows between the rows of sweet potato 30 days after planting the slips, with the first cutting carried out 90 days after sowing. The addition of poultry litter to the soil increased the total production of sweet potato roots for the crop planted in Roraima, whether intercropped or not with sunn hemp. Despite the benefits to sweet-potato yield from the addition of poultry litter and the intercrop with sunn hemp, total productivity was greater in the additional treatment that received organic and mineral fertiliser.