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المؤلفون: Yulu Chen, Tiancai Guo, Jing-bao Liu, Geng Ma, Chenyang Wang, Panpan Zhang, Jun-jie Lü
المصدر: Journal of Integrative Agriculture, Vol 20, Iss 12, Pp 3277-3288 (2021)
مصطلحات موضوعية: Agriculture (General), Soil nitrogen, chemistry.chemical_element, Plant Science, Zinc, Biochemistry, S1-972, Endosperm, Nutrient, Food Animals, Anthesis, Aleurone, nutrient distribution, N remobilization, Ecology, food and beverages, soil N application, Nitrogen, winter wheat, Horticulture, chemistry, Shoot, Animal Science and Zoology, foliar Zn application, Agronomy and Crop Science, Food Science
الوصف: Increasing zinc (Zn) concentration in wheat grain is important to minimize human dietary Zn deficiency. This study aimed to investigate the effect of foliar Zn and soil nitrogen (N) applications on the accumulation and distribution of N and Zn in grain pearling fractions, N remobilization, and the relationships between nutrient concentration in the vegetative tissues and grain or its fractions in two cropping years in the North China Plain. The results showed a progressive decrease in N and Zn concentrations from the outer to the inner parts of grain, with most of the accumulation in the core endosperm. Foliar Zn application significantly increased N concentration in the pericarp, and soil N application increased N concentration in each grain fraction. Both treatments significantly increased core endosperm Zn concentration. Foliar Zn had no effect on grain N and Zn distribution. Soil N application made N concentrated in the aleurone, promoted Zn translocation to the core endosperm and also increased N remobilization and its efficiency from the shoot to the grain, but no improved contribution to grain was found. N concentration in grain and its fractions were positively correlated with N in vegetative organs at anthesis and maturity, while positive correlations were obtained between N concentration in the pericarp and progressive central area of the endosperm and Zn concentration in the core endosperm. Thus, foliar Zn and soil N applications effectively increased yield and N and Zn concentrations in the wheat grain, particularly in the endosperm, and could be promising strategies to address Zn deficiency.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::414b2b0037273e8f5b9c33f6e446b561Test
https://doi.org/10.1016/s2095-3119Test(20)63491-8 -
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المؤلفون: Ya-long Kang, Yangchun Xu, Xin-lan Mei, Caixia Dong, Hai-bo Jiang, Hong-xu Li, Ming-xin Zhao
المصدر: Journal of Integrative Agriculture, Vol 19, Iss 5, Pp 1340-1353 (2020)
مصطلحات موضوعية: 0106 biological sciences, Field experiment, Agriculture (General), Distribution (economics), Plant Science, Biology, engineering.material, 01 natural sciences, Biochemistry, S1-972, N distribution, Human fertilization, Food Animals, Spring (hydrology), N remobilization, PEAR, geography, geography.geographical_feature_category, Ecology, N storage, business.industry, Pear (Pyrus bretschneideri Rehd cv. Huangguan), 04 agricultural and veterinary sciences, Horticulture, Shoot, 040103 agronomy & agriculture, engineering, 0401 agriculture, forestry, and fisheries, Animal Science and Zoology, Fertilizer, fertilization time, Bloom, business, Agronomy and Crop Science, 010606 plant biology & botany, Food Science
الوصف: In order to improve the management of nitrogen (N) fertilization in pear orchards, we investigated the effects of application timing on the distribution, storage, and remobilization of N in mature pear trees in a field experiment at Jingtai County, Gansu Province, China. Nine trees were selected for the experiment and each received equal aliquots of 83.33 g N in the autumn, spring, and summer, with 15N-labeled (NH4)2SO4 used in one of the aliquots each season. Results showed that the (15N H4)2SO4 applied in the autumn remained in the soil during the winter. In the following spring this N was absorbed and rapidly remobilized into each organ, especially new organs (leaves, fruit and new shoots). The 15N supplied in spring was rapidly transported to developing fruit between the young fruit and fruit enlargement stages. 15N from the summer application of fertilizer was mainly stored in the coarse roots over the winter, then was mobilized to support growth of new organs in spring. In conclusion, for pear trees we recommend that the autumn application of N-fertilizer be soon after fruit harvest in order to increase N stores in fine roots. Spring application should be between full bloom and the young fruit stages to meet the high N demands of developing fruit. Summer application of fertilizer at the fruit enlargement stage does not contemporaneously affect the growth of pears, but increases the N stored in coarse roots, and in turn the amount available for remobilization in spring.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b7877d0abe08227d4b609f91795f7c1Test
http://www.sciencedirect.com/science/article/pii/S2095311919627589Test -
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المؤلفون: Zhang Lili, Peng Hou, Xiang-li Zhou, Jun Fu, Fan Ye, Hua Qi, Yang Hailong
المصدر: Journal of Integrative Agriculture, Vol 18, Iss 8, Pp 1882-1892 (2019)
مصطلحات موضوعية: 0106 biological sciences, Canopy, Agriculture (General), chemistry.chemical_element, Plant Science, Biology, maize, 01 natural sciences, Biochemistry, Green leaf, S1-972, Persistence (computer science), Food Animals, post-silking N uptake, Dry matter, stay green, Hybrid, N remobilization, Ecology, plant density, Plant density, 04 agricultural and veterinary sciences, Nitrogen, Horticulture, chemistry, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Animal Science and Zoology, Nitrogen accumulation, Agronomy and Crop Science, 010606 plant biology & botany, Food Science
الوصف: Stay green (SG) maize was found to have higher grain yield and post-silking nitrogen (N) uptake (PostN) compared with a non-stay green (NSG) hybrid. To understand the effects of plant density on grain yield (GY) and N efficiency in modern maize hybrids, we compared two modern hybrids (SG hybrid DY508 and NSG hybrid NH101) with similar maturity ratings at three plant densities (45000, 60000, and 75000 pl ha−1) in 2014 and 2015. GY, leaf senescence, dry matter (DM) accumulation, N accumulation, PostN, and post-silking N remobilization (RemN) were analyzed. DY508 and NH101 had similar GY, but DY508 had higher thousand kernel weight (TKW) and lower kernel number (KN) than NH101. Plant density significantly increased GY in the two hybrids. On average, over the two years, plant density improved GY in DY508 and NH101 by 18.5 and 11.1%, respectively, but there were no differences in total dry matter (TDM) and post-silking DM (PostDM) between the two hybrids. Plant density improved leaf N, stem N, and grain N at the silking and maturity stages in 2014 and 2015. DY508 was lower in harvest index (HI), nitrogen harvest index (NHI), and grain N concentration (GNC) than NH101. Grain N in DY508 was 2.61 kg ha−1 less than in NH101, and this was caused by lower GNC and leaf RemN. On the average, DY508 was 1.62 kg ha−1 less in leaf remobilized N (leaf RemN) than NH101, but was similar in stem remobilized N (stem RemN; 2.47 kg ha−1 vs. 3.41 kg ha−1). Maize hybrid DY508 shows delayed leaf senescence in the upper and bottom canopy layers in the later stages of growth. The present study provides evidence that the NH101, which has rapid leaf senescence at the late grain-filling stage, has gained equivalent GY and higher leaf RemN, and was more efficient in N utilization.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c88956352f88e6a016d144f92c6ec63dTest
https://doi.org/10.1016/s2095-3119Test(18)62087-8 -
4صورة
مصطلحات موضوعية: Biochemistry, Cell Biology, Molecular Biology, Biotechnology, Ecology, Developmental Biology, Infectious Diseases, Plant Biology, Virology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, light spectrum, Total N content, source, biomass allocation, N remobilization, Quercus variabilis Blume, leaf morphology, protein contents, green-light spectrum, N pulse, light spectra, root N concentration, shading conditions, 120 mg 15 N plant, sunlight transmittance, Chinese cork oak, NH, 250 ppm N solution
الوصف: Columns and bars represent means and standard errors, respectively. Different letters denote a significant difference according to Tukey’s test at the 0.05 level.
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مصطلحات موضوعية: Biochemistry, Cell Biology, Molecular Biology, Biotechnology, Ecology, Developmental Biology, Infectious Diseases, Plant Biology, Virology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, light spectrum, Total N content, source, biomass allocation, N remobilization, Quercus variabilis Blume, leaf morphology, protein contents, green-light spectrum, N pulse, light spectra, root N concentration, shading conditions, 120 mg 15 N plant, sunlight transmittance, Chinese cork oak, NH, 250 ppm N solution
الوصف: (XLSX)
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6صورة
مصطلحات موضوعية: Biochemistry, Cell Biology, Molecular Biology, Biotechnology, Ecology, Developmental Biology, Infectious Diseases, Plant Biology, Virology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, light spectrum, Total N content, source, biomass allocation, N remobilization, Quercus variabilis Blume, leaf morphology, protein contents, green-light spectrum, N pulse, light spectra, root N concentration, shading conditions, 120 mg 15 N plant, sunlight transmittance, Chinese cork oak, NH, 250 ppm N solution
الوصف: Columns and bars represent means and standard errors, respectively. Different letters denote a significant difference according to Tukey’s test at the 0.05 level.
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7صورة
مصطلحات موضوعية: Biochemistry, Cell Biology, Molecular Biology, Biotechnology, Ecology, Developmental Biology, Infectious Diseases, Plant Biology, Virology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, light spectrum, Total N content, source, biomass allocation, N remobilization, Quercus variabilis Blume, leaf morphology, protein contents, green-light spectrum, N pulse, light spectra, root N concentration, shading conditions, 120 mg 15 N plant, sunlight transmittance, Chinese cork oak, NH, 250 ppm N solution
الوصف: Tanks for potted seedlings were 40 × 60 cm. Green tanks contained seedlings subjected to 15 N pulses and black tanks contained seedlings subjected to water addition of the same volume.
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8صورة
مصطلحات موضوعية: Biochemistry, Cell Biology, Molecular Biology, Biotechnology, Ecology, Developmental Biology, Infectious Diseases, Plant Biology, Virology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, light spectrum, Total N content, source, biomass allocation, N remobilization, Quercus variabilis Blume, leaf morphology, protein contents, green-light spectrum, N pulse, light spectra, root N concentration, shading conditions, 120 mg 15 N plant, sunlight transmittance, Chinese cork oak, NH, 250 ppm N solution
الوصف: Data that failed to follow a normal distribution were transformed by logarithm plus 1.0. Columns and bars represent means and standard errors, respectively. Different letters denote a significant difference according to Tukey’s test at the 0.05 level.
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9صورة
مصطلحات موضوعية: Biochemistry, Cell Biology, Molecular Biology, Biotechnology, Ecology, Developmental Biology, Infectious Diseases, Plant Biology, Virology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, light spectrum, Total N content, source, biomass allocation, N remobilization, Quercus variabilis Blume, leaf morphology, protein contents, green-light spectrum, N pulse, light spectra, root N concentration, shading conditions, 120 mg 15 N plant, sunlight transmittance, Chinese cork oak, NH, 250 ppm N solution
الوصف: Data that failed to follow a normal distribution were transformed by logarithm plus 1.0. Columns and bars represent means and standard errors, respectively. Different letters mark significant difference according to Tukey’s test at the 0.05 level.
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10صورة
مصطلحات موضوعية: Biochemistry, Cell Biology, Molecular Biology, Biotechnology, Ecology, Developmental Biology, Infectious Diseases, Plant Biology, Virology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, light spectrum, Total N content, source, biomass allocation, N remobilization, Quercus variabilis Blume, leaf morphology, protein contents, green-light spectrum, N pulse, light spectra, root N concentration, shading conditions, 120 mg 15 N plant, sunlight transmittance, Chinese cork oak, NH, 250 ppm N solution
الوصف: Columns and bars represent means and standard errors, respectively. Different letters denote a significant difference according to Tukey’s test at the 0.05 level.