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phosphorus supply and management in vegetable production systems in China

Frontiers of Agricultural Science and Engineering 2019年第4期6卷 348-356页

作者： Rui WANG Weiming SHI Yilin LI State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China

Vegetable production systems involve high rates of chemical and organic fertilizer applications,leading to significant P accumulation in vegetable soils,as well as a decrease in P use efficiency(PUE),which is one of the key limiting factors in vegetable *** review introduces the vegetable production systems in China and their fertilization status,and analyzes probable causes of overfertilization of vegetable *** developed root systems and high P demand have led to the need to maintain much higher available P concentrations in the root zone for regular growth of vegetables,which might necessitate higher phosphate fertilizer input than the plants *** on strategies to improve vegetable PUE and the mechanisms of these strategies are summarized in this *** the P uptake by vegetables by supplying P during the critical growth stage and effectively utilizing the accumulated P by optimizing the C:P ratio in soils can substantially increase *** advances will provide a basis for improving PUE and optimizing phosphate fertilizer applications in vegetable production through regulatory *** addition,some policies are recommended that could ensure the safety of vegetables and improve product *** review also aims to improve understanding of P cycling in vegetable fields and assist in the development of best practices to manage P reserves globally.

关键词： phosphate fertilizer phosphorus use efficiency vegetable production systems phosphorus management policy recommendation

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Nitrogen and phosphorus Fertilization Promotes Aerial Part Development and Affect Nutrient Uptake by Carobinha of the Brazilian Cerrado

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American Journal of Plant Sciences 2017年第13期8卷 3377-3398页

作者： Willian Vieira Goncalves Maria do Carmo Vieira Thiago de Oliveira Carnevali Néstor A.Heredia Zarate Heldo Denir Vhaldor Rosa Aran Katia Cristina Silva Mineli Agrarian Science Faculty Federal University of Grande Dourados—UFGDUniversity CityDouradosBrazil Federal University of Para—UFPA Sao SebastiaoBrazil Biological and Environmental Sciences Faculty UFGDDouradosBrazil

Producing Brazilian Cerrado plants, especially ones endangered, is essential for your maintenance. In this way, fertilization is furthermore uncertain. Here, we demonstrate the impact of soil addition of nitrogen (N, 4.20, 18.90, 31.50, 44.10 and 59.85 mg·dm-3) and phosphorus (P, 9.56, 57.38, 95.62, 133.86 and 181.67 mg·dm-3) fertilizers levels on the development and on nutrients uptake by Jacaranda decurrens subsp. symmetrifoliolata (carobinha), species of the Brazilian Cerrado, in a long term pot trial. The N and P addition together increased plant height and N concentration in roots. N and P also increased the P concentration and content on the roots in young plants, but in the older plants, isolated effect of both was stronger than their combined action. The N addition promoted branching, production of dry leaves and dry xylopodium, contents of K, Ca and P on the leaves, and N content on the roots. However, the N reduced xylopodium diameter, leaf area, and Mg contents in the young plants, but increased them in the older plants. The P addition increased stem diameter and dry biomass, P concentration and N content on the leaves, Ca content on the roots and also reduced N concentration on the leaves. However, the P addition increased Mg concentration on the roots in the young plants and reduced it in the older plants. In general, N levels ranging between 25.69 - 38.85 mg·dm-3 and P levels between 84.39 - 109.23 mg·dm-3 promote more effectively the plant development. Thus, N and P fertilization can promote the aerial development of plant and a differential allocation of nutrients between the carobinha tissues.

关键词： Jacaranda decurrens Sub sp.symmetrifoliolata Bignoniaceae Nitrogen management phosphorus management

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