Greenhouse crops: A review

Manrique, Luis A.

doi:10.1080/01904169309364697

Cited by 24 publications

(19 citation statements)

References 205 publications

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“…Besides, differences in the characteristics of mulch materials may influence the quality and chemical composition of leachate. Nitrogen use efficiency is low for bell peppers in the initial development stages mainly because the crop grows slowly during the first 38% of growing season and absorbs only 7% of the total nitrogen (Locascio et al, 1985;Manrique, 1993). Vitosh and Jacobs (1990) and Errebhi et al (1998) pointed out the excess nitrogen applied early in the growing season has a high potential of being lost by leaching.…”

Section: Discussionmentioning

confidence: 99%

Mulching decreases nitrate leaching in bell pepper (Capsicum annuum L.) cultivation

Romić

Borošić

et al. 2003

Agricultural Water Management

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A 2-year study was conducted in the Vrana Valley (Mediterranean region of Croatia) to evaluate the effects of application of different mulching materials and drip-fertigation on nitrate leaching in bell pepper (Capsicum annuum L.) cultivation. Nitrate-N leaching from the root zone of bell pepper was compared in three treatments: control without mulch, with black polyethylene (PE) mulch and with biodegradable cellulose mulch. In the first year, the highest quantities of nitrogen were leached in the treatment without mulch (26 kg ha À1 ) following by the treatment with cellulose mulch (18 kg ha À1 ) and the lowest nitrogen leaching (10 kg ha À1 ) was observed in the treatment with black PE mulch. At the end of the harvest, cellulose mulch, a microbiologically degradable material, started to decompose and disintegrate, which resulted in the cellulose mulch treatment behaving similarly than the control treatment without mulch. In the second year, significant leaching occurred after the last harvest in September. As the bell pepper yield was significantly lower than expected and calculated for fertilisation, the crop did not take up all nitrogen supplied by fertilisation, which resulted in higher concentrations of nitrate in the soil solution. These nitrate concentrations were subjected to leaching caused by precipitation, a regular occurrence in the autumn and winter in this region. However, mulched surfaces showed lower quantities of nitrate leached in comparison with the treatment without mulching. Mulching with black PE film, besides producing higher yields, reduces the leaching of nitrate fertilisers, and combined with fertigation can reduce a potential risk of surface and ground water pollution by nitrate. #

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Section: Discussionmentioning

confidence: 99%

Mulching decreases nitrate leaching in bell pepper (Capsicum annuum L.) cultivation

Romić

Borošić

et al. 2003

Agricultural Water Management

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“…3) (Opeňa, Kuo and Yoon, 1988;Hill, 1990;Rubatzky and Yamaguchi, 1997). Chinese cabbage is an annual, flowering vegetable which takes 6 to 11 weeks from sowing to the end of the vegetative stage, when the plants reach a height of 15 cm to 30 cm (Manrique, 1993;Rubatzky and Yamaguchi, 1997;Hong-Fu, 1988). It has a stout taproot, which is sometimes partly swollen.…”

Section: Spider Flower (Cleome Gynandra L)mentioning

confidence: 99%

African leafy vegetables in South Africa

Rensburg¹,

Averbeke²,

Slabbert³

et al. 2009

WSA

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In this article the term 'African leafy vegetables' was adopted to refer to the collective of plant species which are used as leafy vegetables and which are referred to as morogo or imifino by African people in South Africa. Function is central in this indigenous concept, which is subject to spatial and temporal variability in terms of plant species that are included as a result of diversity in ecology, culinary repertoire and change over time. As a result, the concept embraces indigenous, indigenised and recently introduced leafy vegetable species but this article is concerned mainly with the indigenous and indigenised species. In South Africa, the collection of these two types of leafy vegetables from the wild, or from cultivated fields where some of them grow as weeds, has a long history that has been intimately linked to women and their traditional livelihood tasks. Among poor people in remote rural areas the use of these types of leafy vegetables is still common but nationwide there is evidence of decline, particularly in urban areas. Cultivation of indigenous or indigenised leafy vegetables is restricted to a narrow group of primarily indigenised species in South Africa. Seven groups of indigenous or indigenised African leafy vegetables that are important in South Africa were given special attention and their local nomenclature, ecology, use and cultivation are discussed.

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“…Ehret, personal communication), tomato (Manrique, 1993). The consequences of applying such high amounts of nutrients are two-fold.…”

Section: Introductionmentioning

confidence: 95%

Growth of a tomato crop at reduced nutrient concentrations as a strategy to limit eutrophication

Siddiqi

Kronzucker

Britto

et al. 1998

Journal of Plant Nutrition

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In tomato (Lycopersicon esculentum L. cv Trust Fl), effects of various nutrient treatments on growth, fruit yield and quality, nutrient uptake and accumulation were studied in a hydroponic system. Reductions of macronutrient concentrations to 50% (0.5 x C) or 25% (0.25 x C) of the control (C) levels as well as cessation of replenishment of the feed solution for the last 16 days after 7 months growth at control levels, had no adverse effect on growth, fruit yield and fruit quality. However, reduction of macronutrient concentration to 10% of control (0.

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Greenhouse crops: A review

Cited by 24 publications

References 205 publications

Mulching decreases nitrate leaching in bell pepper (Capsicum annuum L.) cultivation

Mulching decreases nitrate leaching in bell pepper (Capsicum annuum L.) cultivation

African leafy vegetables in South Africa

Growth of a tomato crop at reduced nutrient concentrations as a strategy to limit eutrophication

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