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Ren Tian-ju - One of the best experts on this subject based on the ideXlab platform.
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Correlation Analysis of Temperature and Agronomic Characters of Ratooning Rice
Agricultural Meteorology, 2002Co-Authors: Ren Tian-juAbstract:During 1987～1988,two hybrid rices-Shanyou 63 and Gangai 63 were planted as middle rice on the same altitude of 250～450m in Yubeiqu District of Chongqing,The ratoon rices grew at different natural temperatures. The results showed: the mean daily temperature decreased gradually with the altitude increasing progressively in the Ratooning reason. The correlations between mean daily temperature and the 1000-grain-weight and growth duration of Ratooning rice were significantly negative. Mean daily temperature showed significant correlation with agronomic characters such as the number of Ratooning seedling,valid panicle,plant height,panicle length, grains per panicle,plump grains per panicle,seed setting rate ,and output per square;The correlations between mean daily temperature in the period of Ratooning seedling and heading or florescence, and grain yield per ha were also significantly positive .It was concluded that the superior limit is about 340m altitude for planting Ratooning rice to obtain stable higher yield in Chongqing by using the varieties of middle-late hybrid rice, the corresponding mean yearly temperature is 17.8℃,and the mean daily temperature between the first day with the temperature of 10℃ and the final day with the temperature of ≥22℃ continued for 5 days is 22.8℃.
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Study on the fertilizing technology of increasing grain yield of hybrid middle-season rice and Ratooning rice
Southwest China Journal of Agricultural Sciences, 2001Co-Authors: Ren Tian-juAbstract:Fertilizing trials were conducted to research the yield increase effects of hybrid middle-season rice and Ratooning rice.Results indicated that using the decreased fertilizer in establishing and tillering to booting stages can promote tillering quickly, grow steadiy in middle stage, increase resistance to stress and form proper tiller population and healthy plants in late stage. This fertilizing method can also advance photosynthetic rate and nitrogen utilization ratio, increase 1000-grain weight of main rice and Ratooning bud survival rate, promote Ratooning bud growth, increase Ratooning plants population and spikes, advance main and Ratooning rice grain yield. This methods especially suited to the hybrid rice combinations charactered by small spike; While for the treatment transplanted with double seedling per hill, properly increasing plant density and nitrogen utilization, applying potassium after middle stage,the effect was more notable. When nitrogen was applied before transplanting(50%), tillering (20%) and booting (30%), the grain yield of main and Ratooning rice was higher than those of other eight individual Ratooning cultivating measures. Appling booting (or grain) fertilizer was the key factor in this fertilizing method, suitable fertilizing time was usually in booting or heading stage according to the growing conditions in middle stage.
Zhuang Wen - One of the best experts on this subject based on the ideXlab platform.
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Comparison on source-sink relationship of Ratooning rice and main crop of super hybrid rice
Subtropical Agriculture Research, 2009Co-Authors: Zhuang WenAbstract:The morphological characteristics of source and sink of Ratooning rice and its same-term tasselling main crop are compared.The characteristic of sink is that the number of effective panicle and the spikelets per panicle of Ratooning rice are obviously less than those of main crop.The spikelets per panicle of Ratooning rice is only 1/3-1/2 of main crop.The characteristic of source is that the LAI in main crop is 6-7 times more than that in Ratooning rice.The photosynthetic rate of Ratooning rice is higher than that of main crop,3 super hybrid rice combinations shows higher photosynthetic rate than Shanyou 63.The characteristic of bleeding is that dry matter amount of single plant at ripening stage of Ratooning rice is as heavy as 25%-35% of main crop.No matter main crop or Ratooning crop,exporting percentage of stem and sheaths of the super hybrid combinations are higher than that of Shanyou 63.Exporting percentage of stem and sheaths and total dry matter amount of single plant of main crop and Ratooning rice are positive correlation.As for source-sink relationship: the rate of grain and leaf area in Ratooning rice is 2-3 times higher than that in main crop.The main crop belongs to sink-limited,while the Ratooning rice belongs to source-sink interaction,and the effect of source-limited is more obvious.
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Progresses in Research on Ratooning Rice and Ratooning Utilization of Super Hybrid Rice
Hybrid Rice, 2007Co-Authors: Zhuang WenAbstract:Ratooning rice is a type of rice with a special cultivating system.The research progresses on Ratooning rice and Ratooning utilization of super hybrid rice were reviewed.Super hybrid rice has a great yield potential,however,how to make a full play of its yield potential and to further increase rice yield by means of the Ratooning system is a new topic for the development of super hybrid rice.
Wijaya Andi - One of the best experts on this subject based on the ideXlab platform.
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Perbandingan Efek Pemberian Bioinsektisida dan Ekstrak Kompos terhadap Produksi Padi Ratun dan Populasi Serangga Hama
'Department of Agronomy and Horticulture', 2015Co-Authors: Herlinda Siti, Kusuma Amarilisa, . Suwandi, Wijaya AndiAbstract:The advantages of Ratooning rice are to save water, cost production, labor, preparation time for planting and harvesting, but the Ratooning productivity is still low. This research aimed to study the effect of the bioinsecticide and compost extract on Ratooning rice production and insect populations. The Ratooning rice was applied by bioinsecticide, compost extract, and combination of bioinsecticide and compost extract with dose 2 L ha-1 per application, respectively. Data of agronomic variables were statistically analyzed using analysis of variance, whereas insect pest population data were analyzed using Chi Square test. The seedling height of ratoon applied by compost extract was the highest among treatments. The number of productive tillers per clumps and rice production on plot applied by compost extract were higher than the insecticide treatment. At the age of 17 day-Ratooning rice, application bioinsecticide reduced the population of insect pests, such as Ciccadulina bipunctata, Recilia dorsalis, Nilaparvata lugens, and Nephotettix nigropictus. Thus, application of compost extract tended to improved the growth and production of the Ratooning rice, while the bioinsecticide decreased the insect pest population.Keywords: Beauveria bassiana, rice growth, productio
Douglas B. White - One of the best experts on this subject based on the ideXlab platform.
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The Ethics and Reality of Rationing in Medicine
Chest, 2011Co-Authors: Leslie P. Scheunemann, Douglas B. WhiteAbstract:Rationing is the allocation of scarce resources, which in health care necessarily entails withholding potentially beneficial treatments from some individuals. Rationing is unavoidable because need is limitless and resources are not. How rationing occurs is important because it not only affects individual lives but also expresses society's most important values. This article discusses the following topics: (1) the inevitability of rationing of social goods, including medical care; (2) types of rationing; (3) ethical principles and procedures for fair allocation; and (4) whether rationing ICU care to those near the end of life would result in substantial cost savings.
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Critical Care Rationing: International Comparisons
Chest, 2011Co-Authors: Timothy W. Evans, Leslie P. Scheunemann, Douglas B. White, Stefano Nava, Guillermo Vazquez Mata, Bertrand Guidet, Elisa Estenssoro, Robert A. Fowler, Constantine A. ManthousAbstract:Every country has finite resources that are expended to provide citizens with social "goods," including education, protection, infrastructure, and health care. Rationing—of any resource—refers to distribution of an allotted amount and may involve withholding some goods that would benefit some citizens. Health-care rationing is controversial because good health complements so many human endeavors. We explored (perceptions regarding) critical care rationing in seven industrialized countries. Academic physicians from England, Spain, Italy, France, Argentina, Canada, and the United States wrote essays that addressed specific questions including: (1) What historical, cultural, and medical institutional features inform my country's approach to rationing of health care? (2) What is known about formal rationing, especially in critical care, in my country? (3) How does rationing occur in my ICU? Responses suggest that critical care is rationed, by varying mechanisms, in all seven countries. We speculate that while no single "best" method of rationing is likely to be acceptable or optimal for all countries, professional societies could serve international health by developing evidence-based guidelines for just and effective rationing of critical care.
Amarilisa Kusuma - One of the best experts on this subject based on the ideXlab platform.
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perbandingan efek pemberian bioinsektisida dan ekstrak kompos terhadap produksi padi ratun dan populasi serangga hama a comparison between effect of bioinsecticide and compost extract on Ratooning rice production and insect pest population
2015Co-Authors: Siti Herlinda, Amarilisa KusumaAbstract:The advantages of Ratooning rice are to save water, cost production, labor, preparation time for planting and harvesting, but the Ratooning productivity is still low. This research aimed to study the effect of the bioinsecticide and compost extract on Ratooning rice production and insect populations. The Ratooning rice was applied by bioinsecticide, compost extract, and combination of bioinsecticide and compost extract with dose 2 L ha -1 per application, respectively. Data of agronomic variables were statistically analyzed using analysis of variance, whereas insect pest population data were analyzed using Chi Square test. The seedling height of ratoon applied by compost extract was the highest among treatments. The number of productive tillers per clumps and rice production on plot applied by compost extract were higher than the insecticide treatment. At the age of 17 day-Ratooning rice, application bioinsecticide reduced the population of insect pests, such as Ciccadulina bipunctata, Recilia dorsalis, Nilaparvata lugens, and Nephotettix nigropictus. Thus, application of compost extract tended to improved the growth and production of the Ratooning rice, while the bioinsecticide decreased the insect pest population.
