检索结果-南通市图书馆

Combining gas exchange and chlorophyll a fluorescence measurements to analyze the photosynthetic activity of drip-irrigated cotton under different soil water deficits

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2016年第6期15卷 1256-1266页

作者： LUO Hong-hai Tsimilli-michael Merope zhang ya-li zhang Wang-feng Key Laboratory of Oasis Ecology Agriculture Xinjiang Production and Construction Group Shihezi University Shihezi 832003 P. R. China Bioenergetics Laboratory University of Geneva Jussy-Geneva CH-1254 Switzerland

Gas exchange and chlorophyll a fluorescence were measured to study the effects of soil water deficit （75, 60 and 45% of field capacity, FC） on the photosynthetic activity of drip-irrigated cotton under field conditions. At light intensities above 1 200 IJmol m-2 s-1, leaf net photosynthetic rate （mn） at 60 and 45% FC was 0.75 and 0.45 times respectively than that of 75% FC. The chlorophyll content, leaf water potential and yield decreased as soil water deficit decreased. Fiber length was significantly lower at 45% FC than at 75% FC. The actual quantum yield of the photosystem II （PSII） primary photo- chemistry and the photochemical quenching were significantly greater at 60% FC than at 75% FC. The electron transport rate and non-photochemical quenching at 45% FC were 0.91 and 1.29 times than those at 75% FC, respectively. The amplitudes of the K- and L-bands were higher at 45% FC than at 60% FC. As soil water content decreased, active PSII reaction centers per chlorophyll decreased, functional PSII antenna size increased, and energetic connectivity between PSII units decreased. Electron flow from plastoquinol to the PSI end electron acceptors was significantly lower at 45% FC than at 75% FC. Similar to the effect on leaf Po, water deficit reduced the performance index （PIABs, tot） in the dark-adapted state. These results suggest that （i） the effect of mild water deficit on photosystem activity was mainly related to processes between plastoquinol and the PSI end electron acceptors, （ii） PSI end electron acceptors were only affected at moderate water deficit, and （iii） PIABs. tota can reliably indicate the effect of water deficit on the energy supply for cotton metabolism.

关键词： cotton drought JIP-test modulated fluorescence quenching analysis photosynthetic rate

Systematical regulation involved in heterogeneous photosynthetic characteristics of individual leaf in pima cotton

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2022年第4期21卷 995-1003页

作者： zhang Yu-jie HAN Ji-mei LEI zhang-ying MENG Hao-feng zhang Wang-feng zhang ya-li Key Laboratory of Oasis Eco-Agriculture Xinjiang Production and Construction Corps/College of AgronomyShihezi UniversityShihezi 832003P.R.China

light heterogeneity leads to anatomically and physiologically heterogeneous features in leaves. However, little attention has been paid to the effects of nonuniform illumination on the anatomical and photosynthetic performance on both sides along the leaf main vein. This study explored such effects by combining in situ determination in the field with shading simulation in the phytotron, on pima cotton that has cupping leaves. Photosynthetic characteristics and morphological structures were measured in the field on both sides along the main vein of eastward, westward, southward, and northward leaves. The results showed that the difference in photosynthetic capacity between the two sides along the main vein in different directions was closely related to the daily photo irridiance(DPI). This result indicates that the photosynthetic heterogeneity between the two sides is related to their intercepted light energy. The conclusion was further verified by the shading simulation experiments. Photosynthetic capacity and leaf thickness of the unshaded sides of leaves in the half-shaded treatment decreased, compared to those in the unshaded treatment. Therefore, it is conjectured that the development of photosynthetic characteristics on one side is systematically regulated by that on the other side. The study provides theoretical guidance on accessing the feasibility of sampling and directional planting.

关键词： photosynthetic heterogeneity morphological traits leaf mass per area shade systemic regulation

Mechanisms of Enhanced Rice Growth and Nitrogen Uptake by Nitrate

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2007年第6期17卷 697-705页

作者： DUAN Ying-Hua YIN Xiao-Ming zhang ya-li SHEN Qi-Rong College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 （China）

Rice is being increasingly cultivated in intermittently irrigated regions and also in aerobic soil in which Nitrate （NO3^- ） plays important role in nutrition of plant. However, there is no information regarding the influence of nitrate on the overall growth and uptake of nitrogen （N） in rice plant. Solution culture experiments were carried out to study the effects of NO^3- on the plant growth, uptake of N, and uptake kinetics of NH4^＋ in four typical rice （Oryza sativa L.） cultivars （conventional indica, conventional japonica, hybrid indica, and hybrid japonica）, and on plasma membrane potential in roots of two conventional rice cultivars （indica and japonica） at the seedling stage. The results obtained indicated that a ratio of 50/50 NH4^＋-N/NO3^--N increased the average biomass of rice shoots and roots by 20% when compared with that of 100/0 NH4^＋-N/NO3^--N. In case of the 50/50 ratio, as compared with the 100/0 ratio, total N accumulated in shoots and roots of rice increased on an average by 42% and 57%, respectively. Conventional indica responds to NO3^- more than any other cultivars that were tested. The NO^3- supply increased the maximum uptake rate （Vmax） of NH4^＋ by rice but did not show any effect on the apparent Michaelis-Menten constant （Km） value, with the average value of Vmax for NH4^＋ among the four cultivars being increased by 31.5% in comparison with those in the absence of NO3^-. This suggested that NO3^- significantly increased the numbers of the ammonium transporters. However, the lack of effect on the Km value also suggested that the presence of NO3^- had no effect on the affinity of the transporters for NH4^＋. The plasma membrane potential in the roots of conventional indica and japonica were greatly increased by the addition of NO3^- , suggesting that NO3^- could improve the uptake of N by roots of the rice plant. In conclusion, the mechanisms by which NO3^- enhances the growth and N uptake of rice plant was found by the increased value of Vm

关键词： ammonium uptake nitrate nutrition nitrogen uptake plasma membrane potential rice

Nitrate Effect on Rice Growth and Nitrogen Absorption and Assimilation at Different Growth Stages

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2006年第6期16卷 707-717页

作者： DUAN Ying-Hua zhang ya-li SHEN Qi-Rong WANG Song-Wei College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 China

The effect of nitrate （NO3^-） on rice （Oryza sativa L.） growth as well as N absorption and assimilation during different growth stages was examined using three typical rice cultivars. Dry weight, yield, N uptake, nitrate reductase activity （NRA） in leaves, and glutamine synthetase activity （GSA） in roots and leaves during their entire growth periods, as well as the kinetic parameters of ammonium （NH4^＋） uptake at the seedling stage, were measured with solution culture experiments. Results indicated that addition of NH4^＋-N and NO3^-N at a ratio of 75：25 （NH4^＋＋NO3^- treatment） when compared with that of NH4^＋-N alone （NH4^＋ treatment） increased the dry weight of ‘Nanguang＇ cultivar by 30% and ‘Yunjing 38＇ cultivar by 31%, and also increased their grain yield by 21% and 17%, respectively. For the four growth stages, the total N accumulation in plants increased by an average of 36% for ‘Nanguang＇ and 31% for ‘Yunjing 38＇, whereas the increasing effect of NO3^- in the ‘4007＇ cultivar was only found at the seedling stage, in the NH4^＋＋NO3^- treatment compared to the NH4^＋ treatment, NRA in the leaves increased by 2.09 folds, and GSA increased by 92% in the roots and 52% in the leaves of the three cultivars. NO3^- supply increased the maximum uptake rate （Vmax） in the ‘Nanguang＇ and ‘Yunjing 38＇ cultivars, reflecting that the NO3^- itself, not the increasing N concentration, increased the uptake rate of NH4^＋ by rice. There was no effect on the apparent Michaelis-Menten constant （Kin） of the three cultivars. Thus, some replacement of NH4^＋ with NO3^-could greatly improve the growth of rice plants, mainly on account of the increased uptake of NH4^＋ promoted by NO3^-, and future studies should focus on the molecular mechanism of the increased uptake of NH4^＋ by NO3^-.

关键词： growth stages N absorption and assimilation nitrate N uptake rice

Characteristics of Photosystem Ⅱ Behavior in Cotton(Gossypium hirsutum L.) Bract and Capsule Wall

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2013年第11期12卷 2056-2064页

作者： zhang ya-li LUO Hong-hai HU Yuan-yuan Reto J Strasser zhang Wang-feng Key Laboratory of Oasis Eco-Agriculture Xinjiang Production and Construction Group/Agricultural CollegeShihezi University Bioenergetics Laboratory University of Geneva Weed Research Laboratory Nanjing Agricultural University North West University

Though bract and capsule wall of boll in cotton （Gossypium hirsutum L.） have different photosynthetic capacities, the features of photosystem II （PS II） in these organs are scarce. In this paper, chlorophyll a lfuorescence emission was measured to investigate the difference in the photosynthetic apparatus of dark-acclimated （JIP-test） and light-acclimated （light-saturation pulse method） bract and capsule wall. Compared with leaves, the oxygen evolving system of non-foliar organs had lower efifciency. The pool size of PS II electron acceptor of non-foliar organs was small, and the photochemical activity of leaves was higher than that of the bract and capsule wall. In regard to the photosystem I （PS I） electron acceptor side, the pool size of end electron acceptors of leaves was larger, and the quantum yield of electron transport from QA （PS II primary plastoquinone acceptor） further than the PS I electron acceptors of leaves was higher than that of bract and capsule wall. In all green organs, the actual quantum yield of photochemistry decreased with light. The thermal dissipation fraction of light absorbed by the PS II antennae was the highest in bract and the lowest in capsule wall relative to leaves. Compared with leaves, capsule wall was characterized by less constitutive thermal dissipation and via dissipation as lfuorescence emission. These results suggested that lower PS II photochemical activity in non-foliar organs may be result from limitations at the donor side of PS II and the acceptor sides of both photosystems.

关键词： cotton non-foliar photosynthesis chlorophyll fluorescence JIP-test

Calculation method of first collapse span with superhigh water material backfill mining

在线全文

学校读者我要写书评

暂无评论

Journal of Coal Science & Engineering(China) 2012年第4期18卷 374-378页

作者： zhang li-ya DENG Ka-zhong Jiangsu Key Laboratory of Resources and Environmental Information Engineering China University of Mining&TechnologyXuzhou 221116China

It is critical for the material to be of active supporting capacity before initial collapse ot mare root wltn supermgn water material backfill mining, and the maximum bending moment should be first calculated in order to determine the initial collapse span. In the light of principal of virtual work, the simple expression of deflection, bending moment of elastic clamped plate were deduced under the condition of vertical uniform distributed load, horizontal pressure and supporting by elastic foundation, and then, the maximal bending moment expression was derived too. At the same time, the influence degree on square clamped plate by adding horizontal pressure and elastic foundation were analyzed. The results show that the effect of horizontal pressure on maximal bending moment can be ignored when the value of horizontal pressure is two orders of magni- tude less than that of coeificient of elastic stiffness existing elastic foundation.

关键词： first collapse span superhigh water material backfill mining elastic clamped plate principal of virtual work

On Generalized E-Monotonicity in Banach Spaces

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Mathematical Research and Exposition 2010年第5期30卷 903-908页

作者： Fan Long zhang li ya FAN School of Mathematics Science Liaocheng University Shandong 252059 P. R. China

Several new kinds of generalized E-preinvexity and generalized invariant E-monotonicity are introduced in the setting of Banach spaces. The relations between E-preinvexity, E-prequasiinvexity, （pseudo, quasi） E-invexity and invariant （pseudo, quasi） E-monotonicity are studied, which can be viewed as an extension of some known results.

关键词： Eopreinvexity E-invexity invariant E-monotonicity relations.

Detection of Coal Mine Spontaneous Combustion by Fuzzy Inference System

在线全文

学校读者我要写书评

暂无评论

Journal of China University of Mining and Technology 2006年第3期16卷 258-260,265页

作者： SUN Ji-ping SONG Shu MA Feng-ying zhang ya-li Institute of Information Engineering China University of Mining ＆ Technology Beijing 100083 China College of Electronic Information and Control Engineering Shandong Institute of Light Industry Jinan Shandong 250100 China Department of Security and Prevention Chinese People＇s Public Security University Beijing 100038 China

The spontaneous combustion is a smoldering process and characterized by a slow burning speed and a long duration. Therefore, it is a hazard to coal mines. Early detection of coal mine spontaneous combustion is quite difficult because of the complexity of different coal mines. And the traditional threshold discriminance is not suitable for spontaneous combustion detection due to the uncertainty of coalmine combustion. Restrictions of the single detection method will also affect the detection precision in the early time of spontaneous combustion. Although multiple detection methods can be adopted as a complementarity to improve the accuracy of detection, the synthesized method will in- crease the complicacy of criterion, making it difficult to estimate the combustion. To solve this problem, a fuzzy inference system based on CRI （Compositional Rule of Inference） and fuzzy reasoning method FITA （First Infer Then Aggregate） are presented. And the neural network is also developed to realize the fuzzy inference system. Finally, the effectiveness of the inference system is demonstrated bv means of an experiment.

关键词： spontaneous combustion fuzzy inference system CRI FITA neural network

Comparisons of Photosynthetic Characteristics in Relation to lint Yield Among F_1 Hybrids, Their F_2 Descendants and Parental lines of Cotton

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2014年第9期13卷 1909-1920页

作者： FENG Guo-yi GAN Xiu-xia yaO yan-di LUO Hong-hai zhang ya-li zhang Wang-feng The Key Laboratory of Oasis Eco-Agriculture Xinjiang Production and Construction Corps/College of AgricultureShihezi University Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area Ministry of Agriculture/Cotton Research InstituteHebei Academy of Agricultural and Forestry Sciences

We compared the photosynthetic characteristics in relation to yield of two F1 cotton hybrids（Shiza 2-F1 and Xinluzao 43-F1）, their parental lines（NT2, H2 and 4-14） and their F2 descendants at different growth and development stages. The two F1 exhibited heterobeltiosis in net photosynthetic rate（Pn） by 8.1-52.1%, canopy apparent photosynthetic rate（CAP） by 8.2-57.6% and canopy respiration rate（CR） by 3.0-78.7% during the growing season. They also exhibited mid-parent heterosis by 2.0-5.2% in leaf chlorophyll content（SPAD） during the late growth and development stages. Regression analysis showed that both parents contributed to increase in Pn, SPAD and CAP in the F1. A low CR in the F1 matched a low CR of the parental line. Photosynthetic characteristics in the F2 were mainly dependent upon the magnitude and degeneration rate of the F1. Mid-parent heterosis in CAP and in CR during the late growth and development stage reduced the degeneration of the F2. Average dry matter accumulation was 10.7-34.7% higher in the parental lines of Xinluzao 43-F1 than in the parental lines of Shiza 2-F1. Heterobeltiosis in dry matter accumulation was 7.0-23.1% greater for Xinluzao 43-F1 than for Shiza 2-F1. Dry matter accumulation in the F1 was affected by either the dry matter accumulation of parents or heterobeltiosis. Dry matter accumulation in the F2 was mainly influenced by dry matter accumulation in the F1. The yields of the two F1 were 39.1-46.3% higher than their respective parents and 26.4-45.9% higher than that of the conventional cultivar Xinluzao 33. The yields of the two F2 were 9.2-12.8% higher than the parents and 14.9-27.4% higher than that of Xinluzao 33. The photosynthetic production and yield of the F1 and F2 were higher than that of their parents. The increases in Pn and CAP of the F1 and F2 were dependent on the photosynthetic characteristics of their parents. It is thus concluded that the photosynthetic performance, light use efficiency and yield of the F1 can be

关键词： hybrid cotton heterosis photosynthetic characteristics F2