Effects of Different Application Times of Tillering Fertilizer on Grain Yield and Population Development of Double-cropping Rice Transplanted by Machine

The application of tillering fertilizer plays an important role in promoting rice tillering and improving rice yield. However, under the condition of mechanical transplanting, the optimal application time of tillering fertilizer is still unclear. In this study, the early rice cultivar Zhongjiazao 17 and late rice cultivar H You 518 were used as materials, and the effects of different application times of tillering fertilizer on yield and population development of double-cropping rice transplanted by machine were investigated. The tillering fertilizer was applied 7（D07）, 10（D10） and 13（D13） d after the transplanting, respectively. The results showed that compared with those in the D07 treatment groups, the yield of early rice in the D10 and D13 treatment groups were reduced by 9.4% and 3.8%, respectively, and the yield of late rice in the D10 and D13 treatment groups were reduced by 4.5% and 12.6%,respectively. However, there were no significant differences in rice yield among the treatment groups. The application time of tillering fertilizer showed significant effects on grain number per panicle and seed setting rate of early rice. The grain number per panicle in the D10 treatment group was significantly lower than that in the D07 treatment group, and the seed setting rate of the D13 treatment group was significantly lower than that in the D07 treatment group（P〈0.05）. For the late rice, the effect of application time of tillering fertilizer on effective tiller number was most obvious, and the effective tiller number in the D13 treatment group was significantly lower than that in the D07 treatment group（P〈0.05）. Compared with those in the D07 treatment group, the effective tiller numbers, leaf area indexes and biomasses in the D10 and D13 treatment groups were all trended to be decreased. Therefore,to improve the quality of population and fulfill the high-yielding potential of double-cropping rice transplanted by machine, the tillering fertilizer should be applied as early as possible after rice seedlings turn green.

The impacts of timing and insecticides at early stage of late rice on the population development of brown plant hopper(BPH)

Field experiments were carried out in northern Zhejiang Province. Three insecticides (methamidophos,Shachongshuang and triazophos) were used to control the rice leaffolder Cnaphalocrocis medinalis and rice striped stemborer Chilo suppressalis in rice fields during 18—27 days after transplantating. The impacts of timing and insecticides on the population development of brown planthopper Nilaparavata lugens was surveyed by direct counting on the plants or by tapping method.

Characteristics of Chinese population development from 1949 to 2018, and lessons learned

China’s population increased from 540 million in 1949 to 1.4 billion in 2018.Demo-graphic transition provides a theoretical framework to understand China’s popula-tion changes,and we can divide the history of China’s population development into three periods:the period of mortality decline-driven demographic transition(prior to 1970),the period of fertility decline-driven demographic transition(1970-1999),and post-demographic transition period(after 2000).This paper provides a histori-cal overview of China’s population development,and concludes by identifying the main characteristics of this development and the main lessons learned from the pro-cess of population development.

Population Development and Reproduction Health Education in Tibet

MY ancestors have lived in Lhasa, Tibet, for generations. I have personally witnessed the great changes in modern Tibetan society. The total population of the region has doubled since 1951. The Fourth National Census in 1990 revealed that the human fertility rate in the Tibet Autonomous Region was 27.60 per thousand, the natural population growth rate 18.40 per thousand, and the total fertility rate of women at childbearing age 4.22.

Risk factors for acute kidney injury following coronary artery bypass graft surgery in a Chinese population and development of a prediction model

BACKGROUND Acute kidney injury(AKI)after coronary artery bypass graft(CABG)surgery is associated with significant morbidity and mortality.This retrospective study aimed to establish a risk score for postoperative AKI in a Chinese population.METHODS A total of 1138 patients undergoing CABG were collected from September 2018 to May 2020 and divided into a derivation and validation cohort.AKI was defined according to the Kidney Disease Improving Global Outcomes(KDIGO)criteria.Multivariable logistic regression analysis was used to determine the independent predictors of AKI,and the predictive ability of the model was determined using a receiver operating characteristic(ROC)curve.RESULTS The incidence of cardiac surgery–associated acute kidney injury(CSA-AKI)was 24.17%,and 0.53%of AKI patients required dialysis(AKI-D).Among the derivation cohort,multivariable logistic regression showed that age≥70 years,body mass index(BMI)≥25 kg/m2,estimated glomerular filtration rate(eGFR)≤60 mL/min per 1.73 m2,ejection fraction(EF)≤45%,use of statins,red blood cell transfusion,use of adrenaline,intra-aortic balloon pump(IABP)implantation,postoperative low cardiac output syndrome(LCOS)and reoperation for bleeding were independent predictors.The predictive model was scored from 0 to32 points with three risk categories.The AKI frequencies were as follows:0-8 points(15.9%),9-17 points(36.5%)and≥18 points(90.4%).The area under of the ROC curve was 0.730(95%CI:0.691-0.768)in the derivation cohort.The predictive index had good discrimination in the validation cohort,with an area under the curve of 0.735(95%CI:0.655-0.815).The model was well calibrated according to the Hosmer-Lemeshow test(P=0.372).CONCLUSION The performance of the prediction model was valid and accurate in predicting KDIGO-AKI after CABG surgery in Chinese patients,and could improve the early prognosis and clinical interventions.

Development of Permanent Mapping Populations RILs in Diploid A Genome

Recombinant inbred lines(RILs) serve as powerful tools for genetic mapping.RILs are obtained by crossing two inbred lines followed by repeated selfing or sib-mating to create a set of new

Some Important Issues on Population and Sustainable Development In China

the Interntaional Workshop on China's Agenda 21 held in October 1993, Professor Zeng Yi proposed three issues important to the field of population and sustainable development: 1) Promote basic education for children and impede the newly emerging trend of dropping out from school, 2) Improve the social, economic and family status of women and change the traditional 'son-preference' ideology, and 3) Improve the social security system for the elderly to counter the negative effects of accelerating aging of the population.

Suggestions on Macao's Population andEconomic Development

AsMacaoisundergoinganeconomictransitionfromanexport-processingcentertoamixedeconomydominatedbytourism,populationhassurfacedasamajorproblemrestrictingtheregion'sfurthereconomicgrowth.Inmyopinion,Macaoshouldincreaseitspopulationattherighttimeandattheri...

The Systematic Analysis on the Relationship between Population and Agricultural Sustainable Development in Hebei

Regional agricultural sustainable development is the basement and important component of sustainable development system. In view of the relationship between population and regional agricultural sustainable development, this paper proposes some countermeasures on coordination development between population and sustainable agriculture in Hebei Province.

Integration of Population with Development:China's Practice

This article analyses the causes for the decline in the fertility rate of China's population The author attributes the tremendous decline to the following leading causes: the profound understanding and high political commitment of top Chinese leaders, integration of population with development, the extensive IEC programme and effective technical service, on top of others. The author tells how population and development are integrated in practice in the past decades and the overall effectiveness of the integration approach.

Seminar on Population and Sustainable Development

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Population Characteristics and Future Population Countermeasures for the Studied Counties in Tibet, China

Focusing on the 18 counties along “One River and Two Tributaries” region, and based on the data from China 3nl, 4th and 5th population censuses, this article has analyzed the time and spatial changing patterns of the population in this region. The analyses show that since the 3nl population census, total population, average age and total birth rate have all changed considerably: ① Total population has grown, fast, with most counties' annual average growth rate of more than 10. ② In terms of the region's average age, in 2000 the age in the 18 counties is younger than 30 years old. ③ Compared with the 3nl population census, labor force by the 5th census is much younger. ④ Countermeasures are proposed to control population by controlling birth rate as the result of the local resident's quality improvement by education.

Population and Food in Asian Developing Countries

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Tourism Development and Well-Being:The Role of Population and Political Stability

This study's primary purpose was to explore the role of tourism development in enhancing well-being in a highly populated developing economy by focusing on the case study of Pakistan Several econometric techniques and approaches were used on annual time series data covering the 1990-2016 period to investigate the causal relationship of well-being with tourism development,political stability,economics,and population growth.The findings suggested that tourism development enhances economic growth and well-being,hence providing support for the tourism-led growth hypothesis However,population growth and political instability exhibited a negative relationship with well-being;in addition,the level of political stability determined tourism activities.Hence,this study is unique due to its specific focus on the role of political stability and tourism development in the enhancement of wellbeing in a highly populated developing economy Moreover,the practical implications of the study have been provided in light of the main findings.

South-South cooperation in population and development: current progress and future perspectives

The impact of South-South cooperation(SSC)has been bolstered in the context of implementing the International Conference on Population and Development(ICPD)Programme of Action.In the past 25 years since ICPD in 1994,remarkable progress and achievements have been made in promoting SSC in population and develop-ment.China has been committed to working with developing countries,UN agen-cies and international organizations to advance ICPD under the framework of SSC.As the landscape of international development assistance has been changing and the ICPD remains as an unfinished agenda,the SSC has increasingly recognized the importance of effective financial inclusion policy in the implementation of the ICPD and the 2030 Agenda for Sustainable Development.The international community has recently identified seven strategic priority areas for SSC in the next few years,i.e.,(1)population dynamics and development;(2)universal access to reproduc-tive health and family planning services;(3)women’s,children’s and adolescents’health;(4)healthy ageing;(5)migration;(6)health and poverty alleviation;and(7)ending sexual and gender-based violence.The institutionalization and operation-alization remain as critical challenges,and special attention needs to be given to address these issues.Stronger political commitments,enhanced capacity building,better coordination and partnerships establishment of the SSC Center of Excellence,adequate resource mobilization and more evidence-based researches and systematic evaluation are recommended as future strategies for further promoting the SSC in population and development.

ZTE Chairman Bullish on Telecom Business Opportunities in Developing and Densely Populated Nations

ZTE Corporation (ZTE), a leading global provider of telecommunications equipment and network solutions, recently