Feasibility of fish culture under the circumstances of growing the rice on the natural water

We studied the feasibility of a new production mode incorporating rice cultivation with fish culture in 1991.     

UNGA Declared the Year 2004 the International Year of Rice

On 16 December 2002, the United Nations General Assembly (UNGA) declared the year 2004 the International Year of Rice (IYR). The dedication of an International Year to rice, a single crop, is unprecedented in UNGA~s history. In declaring the IYR, the UNGA recognized that rice is the primary food source for more than half of the world‘s population and that enhancing     

Study on the incorporation of standing whole straw into the soil

The physical and chemical properties of the incorporation of whole and chopped straw into the soil and the rice yield of the first year in Northeast China are investigated in this study. Since the incorporated straw would become decayed in 2nd and 3rd year and cause favorable effect on rice growing, only the first year yield is evaluated.     

The change of the cationic peroxidase in the leaves at the fertile transformation period in Nongken 58s

Nongken 58s is a type of photoperiod sensitivegenic male sterile rice which gives rice to malesterility when illuminated time is longer than13.75 h/d. The photoperiod sensitive stagesare from the differentiation of primary branchprimordum (Ⅱ) in young ears to fullness ofcontents of the pollen (Ⅶ). The changes ofactivity and isoenzymes in cation peroxidase atphotoperiod sensitive stages and the relation-     

Studies on the source-sink characteristics and the seedsetting rate in indica-japonica hybrid rice

To study the differences of source-sink characteristics and seed-setting rate between indica/japonica hybrid rice and indica/indica hybrid rice, we conducted this experiment in Yintan City, Jiangxi Province,in 1993. The indica/japonica hybrid rice tested were: Jiangnongzao ⅡA/1044, Jiangnongzao ⅡA/1044zao, Jiangnongzao ⅡA/1046, and 5460s/Guangkanggen 2.The indica/indica hybrid rice tested was Shanyou 63. They were planted in late season, with a transplanting space of 16.7cm×20cm. At the heading stage, the leaf areas were measured, and the experiment of cutting off leaves or spikelets was conducted. The resuts indicated that:     

Report on the Workshop “Research Challenges for the Seed Potato Sector”

Held on July 2017 during the 20^th EAPR Conference in Versailles, France, the workshop intended (1) to review—and exchange with participants—some recent advances and concerns for the seed potato sector (new regulations, seed health, multiplication schemes including true potato seed, seed crop management, etc.) and (2) to define the main challenges for future research and improvement for seed potatoes production and regulation systems to secure the whole chain of potato production.     

Studies on the relationship between the changes of the endogenous scavengers of active oxygen and resistance in hybrid rice under temperature stress

The seedlings of indica hybrid rice Weiyou 49 and Weiyou 28 were exposed to 1℃ and 40℃ .and the changes of activity (content) of superoxide dismutase (SOD), catalase (CAT), peroxidase (POX), ascorbic acid (ASA), glutathione (GSH),malondialdehyde (MDA) and leakage of electrolytes (%) were measured.     

Preliminary studies on radiant spectrum of the leaves of the paddy and upland rice

To study the property of the radiant spectrum(RS),i.e.absorption,reflectance and trans-mission ratio.Four upland rice varieties i.e.Haogelao,Hongkuo—laoshuya,Chengjiang—ludao,and IRAT—109,and four paddy ricevarieties Xifeng,Akihikari,Zhongbai 4,andYuefu were sown at Beijing on dry land in themiddle May,1992 and 1993.The plants weretreated with drought stress during seedling,booting,heading and flowering stages.It wasrainy season or intermittent irrigation duringother period.The RS and the chlorophyll con-tent of the third leave of seedlings and that offlag leave at heading—flowering period weremeasured with UV—190 model spectrometer.The results are shown in Fig 1 and Fig 2.There were little difference of RS in 800-200 mn and chlorophyll content between theleaves of paddy and upland rice during seedlingstage (Fig 1).However,remarkable differ-     

Preliminary study on the genes related to the fertility of indica／japonica hybrid rice

Ｓｔｕｄｙｉｎｇｔｈｅｓｔｅｒｉｌｉｔｙｏｆｉｎｄｉｃａ／ｊａｐｏｎｉｃａｈｙｂｒｉｄｗａｓａｐｒｅ ｒｅｑｕｉｓｉｔｅｆｏｒｔｈｅｕｔｉｌｉｚａｔｉｏｎｏｆｈｅｔｅｒｏｓｉｓｉｎｈｉｇｈｙｉｅｌｄｒｉｃｅｂｒｅｅｄｉｎｇ．Ｉｎ１９８６，Ｉｋｅｈａｓｈｉｅｔａｌｆｏｕｎｄｔｈａｔｗｉｄｅｃｏｍ ｐａｔｉｂｉｌｉｔｙｖａｒｉｅｔｉｅｓ，ｗｈｉｃｈｐｏｓｓｅｓｓｅｄＳ５＿ｎａｌｌｅｌｅ，ｃｏｕｌｄｏｖｅｒｃｏｍｅｔｈｅｓｔｅｒｉｌｉｔｙｏｆｉｎｄｉｃａ／ｊａｐｏｎｉｃａｈｙｂｒｉｄｓ，ａｎｄｔｈｅｓｔ…     

Report of the joint meeting of the Potato Section of EUCARPIA and the Section Breeding and varietal assessment of the EAPR, 3–7 July, 2000, Warsaw (Poland)

Report

Report of the joint meeting of the Potato Section of EUCARPIA and the Section Breeding and varietal assessment of the EAPR, 3–7 July, 2000, Warsaw (Poland)     

Relationship between the eating quality and the physico-chemical properties of high grain quality rice in China

Relationship between eating quality (EQ) andphysico-chemical properties of 78 high grainquality rice varieties, 45 indica and 33 japoni-ca, were studied in 1995. The samples werecollected from different rice growing regions in20 provinces. The physico-chemical proper-ties, including grain length (GL), length towidth ratio (L/W), chalky grain rate (CG),chalkiness (CH), translucency (TR), gela-tinization temperature (GT, measured by alka-li spreading value), gel consistency (GC),amylase content (AC), and protein content(PC) were measured according to the standard     

A DNA finger-print technique was established for the certification of seeds of the hybrid rice Shanyou 63

Cooperate with each other, scienstists from Institute of Genetics, Academia Scinica and CNRRI established a DNA finger-print technique. This is a rapid, simple and accurate technique for the detection of seed purity. Which can be used in the certification of seeds of the most important hybrid rice variety. Shanyou 63. variety in China.     

The effect of 35℃ on the amino acid requirement of the brown planthopper, Nilaparvata lugens

The brown planthopper, N. lugens, is not able to develop well at 35℃. Previous investigation showed that 35℃-treated N. lugens harbored fewer symbionts than untreated ones, and it was suggested that symbiont played an important role in nutritional metabolism. Nevertheless.     

Characterization of Pseudomonas spp.and related bacteria from rice seeds in the subtropics and the tropics

To explore the bacterial diversity for sustain-able management of the major rice diseases,asurvey of bacterial diversity of rice seed wasconducted in Luzon Island of the Philippines(the tropics)and in Zhejiang Province of China(the subtropics),during 1993-1998.One hun-dred sixteen(0.5kg/sample)and 129(1kg/sample)seed samples were collected from the subtropics and the tropics,respectively.Morethan 3000 bacterial isolates were picked and examined under the UV light for their fluores-cence.After colony morphological,pathogeni-cal,and some bacteriological tests,816 non-pathogenic bacteria isolates were selected forfurther identification using a numeric taxono-