Chinese Journal of Agrometeorology

Effects of Elevated CO_2 on Growth and Yield of Different Winter Wheat Cultivars During Later Period

BAI Li-ping 1,TONG Cheng-feng 2,LIN Er-da 2,LU Zhi-guang 3,LI Zhong-hui 3 (1. College of Crop Science, China Agricultural University, Beijing 100094; 2. Institute of Agrometeorology, CAAS; 3. Institute of Resource and Environment, China Agricult

2002, 23(02): .

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According to the designed CO 2 Gradient Chamber (CGC-half of open), this study has examined the effect of different concentrations of CO 2 on two winter wheat cultivars. The results showed that plant height, economical yields and biomass production increased with CO 2 concentration increase. Different cultivars have different responses to CO 2 concentration increase.

Climate Division of High Quality Early Rice Planting Area in Jiangxi Province on the Basis of GIS

WEI Li, YIN Jian-min,WANG Huai-qing (Jiangxi Meteorological Science Institute,Nanchang 330046 )

2002, 23(02): .

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On the basis of many researches on subtropical mountainous climate, combining with local toporgraphy, using spatial analysis and multi-overlapping methods, merging with experts thinking of agriculture and meteorology and climate data from 1961 to 1996,climate division and assessment of high quality early rice planting arar was made. The purpose is to provide scientific basis for adjusting agricultural structure.

Research on Drought-Resisting Technology of Evaporation-Inhibiting and Rain Water Harvesting for Spring Wheat in Dingxi Semiarid Region

ZHU Guo-qing,SHI Xue-gui, LI Qiao-zheng (Dingxi Agrometeorological Testing station of Gansu Province,Dingxi 743000)

2002, 23(02): .

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The effect of application of chemical method combined with physical method on spring wheat was analyzed by using farmland experiments in 1997～2000. The chemical method was application of Agrometeorology No.3,Fa"Handilong" and water-holding substance mixed with seeds; the physical method was plastic film mulching and field micro-rain water harvesting. The result showed that rain water harvesting by farmland combined with drought-resisting substance obtained a best yield-increasing effect in Dingxi semiarid region and it changed little every year even if in the drought year. So it is the best drought-resisting technology of evaporation-inhibiting and rain water harvesting in Dingxi semiarid region. By using this technology, spring wheat seedling emerged 4 days earlier and the rate of seedling emergence increased by 17%～18%,yield increased by 17.6%～72.8%, water use efficiency increased by 3.05kg·mm -1·hm -2, reached 39.1%.

Effect of Climatic Factors on the Contents of Protein and Four Protein Fractions in Early Hsien Rice during the Milking and Mature Period

HUAN Ying-jin 1,QI Ying-xue 2,LIU Yi-bai 1,CHEN Da-zhou 3 (1.Jiangxi Agricultural University,Nanchang 330045; 2.Agricultural Department of Jiangxi Province;3.Jiangxi Academy of Agricultural Science)

2002, 23(02): .

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Effects of climatic factors on the contents of protein and four protein fractions in early hsien rice during the milking and mature period were studied.The results showed that:daily mean temperature and mean daylight hour during the milking and mature period had a great effect on the contents of protein and four protein fractions,of which daily mean temperature was a leading factor affecting the five characters.The daily mean temperature in different time sections had different effects on the five characters during the milking and mature period.Protein content,contents of albumin and glotelin were affected by temperature greatly in the early and middle stages of the milking and mature period,but the contents of globulin and prolamine were affected in the middle and late stages.Differences in distribution of temperature in different time sections affected protein content and contents of four protein fractions of the varieties with different protein contents.

The Cotton Planting and Survival Climatic Section in Hexi Corridor

LIU Ming-chun,LIU Hui-lan,ZHANG Hui-ling,MA Xing-xiang,LI Yan-ying (Agrometeorological Station of Meteorological Bureau in Wuwei City of Gansu Province, Wuwei 733000)

2002, 23(02): .

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The relationship between the growing and development of cotton and meteorological conditions in Hexi Corridor is analyzed. By using integral regress analysis method,lint yield is shown to be positively correlated obviously with ≥10℃ accumulated temperature in growing period,mean temperature in August and September,hours of sunshine in August and September which are indexes of regional planting.Using fuzzy clustering method,Hexi Corridor is divided into feasible planting,inferior to feasible planting,plantable and unplantable four climatic belts and then further suddivision can be done in countryside with smaller gridding.

Water Dynamic and Balance of Broomcorn Millet Field on Semiarid Prone to Draught Area of South Ningxia

LI Jun 1,2,WANG Li-xiang 1,DU Shi-ping 1 (1.College of Agronomy, Northwest Sci-tech University of Agriculture and Forestry. Yangling, Shaanxi 712100; 2.State key Lab of soil Erosion and dryland Farming on Loess plateau, Institute of Soil and Water

2002, 23(02): .

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The field experiment of water dynamic and balance of broomcorn millet on semiarid prone to draught area of south Ningxia was carried out in 1997 to 1999. The results of experiment show that soil water content of 2m soil layer decreased slowly from sowing to harvesting, there is a small difference in soil water content change in different rainfall years and little difference in soil water content change under different fertilizer treatments. There is a remarkable change in soil water content in 0～20cm and 20～80cm soil layers under different fertilizer treatments and relative small changes in soil water content below 80cm soil layer. The average rainfall and water requirement in broomcorn millet growth period is 189.8mm and 345mm respectively. The actual water consumption is only 261.9mm, with water shortage of 83.1mm, the proportion of soil water content is 76% only.

Study on the System for Production and Management of Agrometeorological Observation Report

YANG Tai-ming 1,MA Xiao-qun 1,ZHANG Ai-min 1,JIANG Sheng-guo 2(1.Anhui Provincial Meteor. Institute, Hefei 230031;2.Tongcheng Weather Bureau in Anhui)

2002, 23(02): .

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The system for production and management of agrometeorological observation report is a basic operation software for agricultural meteorology, which covers all observation stations and observed crops. Its functions are autocoding for observations data of agrometeorology, inputing observed data and self-acted printing three kinds of reports such as crops, soil moisture etc.; It also can come true standard store and management of data of reports.

Research on Application of Remote Sensing for Vegetable Coverage Classification in Shaanxi Province

ZHANG Shu-yu,YAN Sheng-an (Shaanxi Remote Sensing Information Center for Agriculture , Xi'an 710015)

2002, 23(02): .

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Research on classification of NOAA and FY-1 satellite images, calculatien of NDVI was carried out and the vegetable coverage thematic map for Shaanxi province,was drafted by using the method of supervised classification combined threshold judgment, and based on analyzing spectral features of different surface objects. Then,a method used for vegetable coverage classification was found. And furthermore,the fire-spot-locating method was used to improve the precision of the RS image geometric correction, and so the problems about correspondence between GCP(ground control point) and image point can be solved.

Agroclimatic Research in China Under Digitalization and Economic Globalization

PAN Xue-biao (Institute of Resource and Environment, China Agricultural University,Beijing 100094)

2002, 23(02): .

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This study reviews the background of digitalization and economic globalization, the problems in development of agroclimatic research in China, the potential and possibility of agroclimatic research at new situation, and put forward the direction of agroclimatic research.

Causes of Desertification and the Prevention and Treatment Measures in Agro-Pastoral Areas in Northern China

MA Yu-xia (Department of Enviromental and Scince Nanjing Institute of Meteorology,Nanjing 210044)

2002, 23(02): .

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The causes of desertification of the agro-pastoral areas in north China were analysed. The main causes of desertification in these areas are artificial and physical factors. The physical factors are draught (less rain),strong wind and abundance sand. The artificial factors are production activity, farming method and population increase. At last the prevention and treatment measures are proposed.

A Preliminary Study of the Effect of Temperature Inversion Lager on Increase of Output and Income From Planting Mushroom in Winter in the West Near Mountain

XIAO Zhi-qiang 1,WEI Yu-juan 1,CHENG Hong-dong 2,SHEN Dong-mei 1 (1. Longnan Meteorological Bureau, Wudu Gansu 746000;2.Liangdang Meteordogical Bureau,Liangdang Gansu)

2002, 23(02): .

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In the hilly area in longnan of Gansu Province of west China,the temperature inversion layer exists extensively.In Bailong dry and hot river valley,where the elevation is about 50～200 metres,the temperature inversion layer occurs most freguently.Its average strength is from 0.5℃to 1.0℃ per 100m.The most one is from 3.1℃ to 4.0℃.In this paper,based on the rule of temperature,the tests of planting Pleurotus ostreatus and Collybia uelulipes have been done.It shows that there is a obvious difference in output of mushroom and income in different areas of different elevations and the highest output of mushroom occurred at the area with an elevation of about 100m.

Analysis of Chilling Injury Weather and the Disaster-Reducing Countermeasures in Xishuanbanna

TAN Ying-zhong 1,GAO Xi-shi 1,HUANG Wen-long 1,DENG Ying 1,PU Gui-ming 2 (1.Meteorological Bureau of Xishuanbanna, Yunnan Province, Jinghong 666100; 2.Yunnan Provincial Meteorological Observatory)

2002, 23(02): .

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The standard of chilling injury in Xishuanbanna in delimited according to the indexes of tropical crops, then regarded the cause of chilling injury weather as the main subject of study in this article. The surface meteorological data from many stations in Xishuanbanna were analyzed and found that there were great regional differences in chilling injury, strong dropping in temperature arising from terrestrial radiation and the prominent phenomenon of temperature inversion in hilly area when chilling injury weather influenced Xishuanbanna. By analyzing the background of upper air circulation, it is concluded initially that the path of cold air influencing Xishuanbanna is the return current to the east plus the joint affect of continuous supplement of the cold air and cooling surface arising from terrestrial radiation was the main contributing factor that caused chilling injury. Then disaster-reducing countermeasures for different tropical crops are also put forward.

Analysis of Main Factors Affecting Sugar Cane Growth and the Measures of Increasing Yield in Zhangzhou

CHEN Zhi-biao, ZHU He-jian (Faculty of Geographical Science, Fujian Normal University, Fuzhou 350007)

2002, 23(02): .

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Photosynthetic productive potentiality (PPP) of sugar cane was estimated in Zhangzhou based on field experiment and the main factors affecting its growth were studied. Results indicate that PPP of sugar cane is between 480.12～548.22t/hm 2. To improve yield, the temperature should be raised in early growth period; the well-irrigated system mainly sprinkling irrigation should be set up; the leaves should be stripped moderately; and the comprehensive steps should be taken to protect lodging and breaking by wind.

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