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Trung L.N.,CAS Institute of Soil and Water Conservation | Liu Z.,Northwest University, China | Liu Z.,Key Laboratory of Plant Nutrition and the Agri environment | Zhang X.,CAS Institute of Soil and Water Conservation | And 2 more authors.
Forestry Studies | Year: 2013

The long-term growth of pure forest is an important issue that affects stability and sustainable development of ecosystem, while using forage litter as fertilizer or directly establishing tree-grass complex vegetation may be the most effective prevention way. This study took the artificial pure forests of Betula platyphylla, which were widely distributed in the Loess Plateau of China, as the object and conducted a 120-day decomposition incubation experiment of forest humus soil mixed with seven common leguminous forage litters to study the effects of forage litters in controlling the degradation of soil biological and chemical properties of pure forests. The results showed that: by adding forage litter to the soil of pure B. platyphylla forest, litters of Lespedeza bicolor and Onobrychis viciaefolia improved the soil quality obviously, followed by Astragalus adsurgens and Melilotus officinalis, while Medicago sativa lead to obvious deterioration, followed by Vicia villosa and Coronilla varia. © 2013 Estonian University of Life Sciences. All rights reserved. Source

Zhang X.-X.,CAS Institute of Soil and Water Conservation | Zhu B.-C.,Northwest University, China | Liu Z.-W.,Key Laboratory of Plant Nutrition and the Agri environment | Bing Y.-H.,Northwest University, China | And 2 more authors.
Nature Environment and Pollution Technology | Year: 2016

Allelopathic effect of humus soil of mono-species-community on the understory plants was a critical problem in the mixed reformation of planted pure forests. In order to investigate the practical allelopathic effect of humus soil of Platycladus orientalis forest on understory plants in the Loess Plateau of China and provide a scientific basis for its future management, humus soils of P. orientalis forests in the hilly (north) and gullied (south) areas of the Loess Plateau were sampled separately for pot experiment of 10 common species of shrubs and grasses, and seed germination, seedling growth and physiological indexes were measured during the whole test. According to the comprehensive analysis, humus soil of P. orientalis forest in the hilly area showed obvious allelopathic inhibition on Medicago sativa, Melilotus officinalis, Vicia villosa and Astragalus adsurgens; while in the gully area, it showed obvious allelopathic inhibition on M. officinalis, V. villosa and Coronilla varia. Species which are inhibited by allelopathic effects should be avoided choosing, to form mixed vegetation with P. orientalis. Source

Wang S.,Northwest University, China | Wang S.,Key Laboratory of Plant Nutrition and the Agri environment | Li M.,Northwest University, China | Li M.,Key Laboratory of Plant Nutrition and the Agri environment | And 16 more authors.
Agronomy Journal | Year: 2015

Although foliar application of Zn is highly efficient in improving Zn concentration in wheat (Triticum aestivum L.) grain, it may be beneficial to better understand its effectiveness when combined with foliar applications of N or P. A 2-yr field experiment was conducted to evaluate the efficacy of concurrent ZnSO4, and commonly used N and P applications on grain Zn, and other nutritional quality indices in wheat. On average, grain Zn concentration increased by 84, 83, and 55% following foliar application of Zn, Zn+N, and Zn+P, respectively. The Zn concentration following foliar application was much greater in the leaves than in the glume or stem. The reduction in the Zn content and the distribution of Zn in the grain and leaves was similar following foliar-applied Zn and foliar-applied Zn+P. This suggests that absorption of Zn in the vegetative tissues (e.g., leaf) was reduced with the addition of P in the foliar spray, but translocation of Zn from the leaf to grain was not inhibited by P. Foliar Zn+N application significantly increased grain protein, Fe, and Ca concentrations, and foliar Zn+P application significantly increased Fe and Ca concentrations. Foliar application of Zn, Zn+N, and Zn+P significantly decreased grain phytic acid (PA)/Zn, PA/Fe, and PA/ Ca molar ratios. The results of this study suggest that the inclusion of Zn in commonly used foliar applications of N or P may be effective for increasing grain Zn concentration in wheat. © 2015 by the American Society of Agronomy, 5585 Guilford Road, Madison, WI 53711. All rights reserved. Source

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