yield selection 中文意思是什麼
yield selection
解釋
正規選種-
In recent years, the water - saving and control irrigation technique of rice has diverted from plot experimental and demonstration to lare scale. and has got remarkable economic and social benefits. amed at the characteristics of this irrigation area, optimal selection for water - saving techniques of rice, deciding the amout of leaching water and irrigation modles, investigating the adaptability of the water - saving and control irrigation technique in saline land. studying the increase in production mechanism of the technique are important to extend the technique, to better and develop saline land as well as slick spots. according to the results of field experiments, optimization study was conducted on the water - saving irrigation technique of rice in saline land, the effects of different water - saving irrigation techniques on the physiological indexes and yield of rice were systematically analyzed. by using mutiplepurpose fuzzy optimization method, better. water - saving irrigation technique was selector out, that is. the control irrigation technique in rice. the mechanism of it was analyzed from the aspect of the physiological and ecological saving water of rice to provide the implemental process and technical point ; throgh the quantitive analysis and comparision on control irrigation and control class ( flood irrigation ), high production and quality mechanism of the technique was analyzed in terms of physiology indexes of rice, the variation of soil moisture, the pest resistance and the lodge resistance, the change of soil temperature in paddy fields. the yield constitutive factors, the quality of rice and so on. in saline land. control irrigation and intermittent leaching modles were adopted to validate the adaptability of the technique in irrigation of rice in saline land, to analyze rice ' s physiological - ecological indexes and the change of soil salt content under the conditions of control irrigation leaching of rice and and to provide control irrigation and combined modle of intermittent leaching to adapt to different conditions
本文從試驗及試驗資料入手，取得以下主要成果和結論：對鹽堿地水稻節水灌溉技術進行優化研究，系統地分析了不同節水灌溉技術對水稻生理指標及產量的影響，採用了多目標模糊優化的方法，對灌水技術進行綜合評判，優選了節水灌溉技術，論證該地區宜採用水稻控制灌溉技術；闡述控灌技術通過調節和控制水稻的需水規律，降低水稻高產情況下的無效水量消耗，從水稻生理、生態節水兩方面分析了控灌技術節水機理，針對性地總結出水稻各生育期實施節水控灌技術的步驟及技術要點；通過控灌與淹灌的定量對照比較，從根系、莖蘗、冠層葉片及綠葉動態到株高，土壤水分變化，抗病蟲害、抗倒伏能力，稻田土溫變化，產量構成因素及稻米品質等諸多方面進行動態比較，分析控灌技術高產優質機理；在鹽堿稻地採用控制灌溉+間歇淋洗模式，跟蹤測試田間水鹽變化狀況，驗證控制灌溉技術在鹽堿地區水稻灌溉中應用的適應性，通過分析水稻控制灌溉淋洗條件下水稻生理生態指標，提出優化控制灌溉+間歇淋洗組合模式，為進一步在高礦化度地區試驗水稻控灌技術奠定基礎。 -
According to the planting and growing situations of guava in the mountain land of changtai county, from the aspects of variety characteristic, garden land selection, site preparation, application, field planting, top application, pruning and retaining fruits, pest control, protecting the fruit with putting covers over it, plucking and packing, and so on, this paper summarized the high - yield cultural technology of guava in the mountain land, and raised the proceedings should be noticed during the planting and producing
摘要根據珍珠番石榴在長泰縣山地種植生產情況，從品種特徵、園地選擇、整地、施肥、定植、施追肥、修剪留果、病蟲害防治、套袋護果、採收包裝等方面總結了珍珠番石榴在山地的高產栽培技術，並提出種植生產中應注意的事項。 -
The knowledge model for pre - sowing plan design includes submodels of target yield calculation, variety selection, sowing or transplanting date, population density and sowing rate, fertilization and water management strategy
其中，播前方案設計知識模型包括產量目標、品種選擇、播栽日期、種植密度與播種量、肥料和水分運籌等。 -
The selection effect was evident that 37. 5 % gain in single individual seed yield could be obtained, which achieved the purpose of improving seed orchard yield and increasing the genetic gain
8年生子代材積可獲得改良增益10 . 6 % ，木材比重可獲得4 . 6 %的增益，種子園單株產種量可獲得增益37 . 5 % ，選擇效果明顯，達到提高種子園產量、增加改良增益的目的。 -
This study dealt with the identification and evaluation of 8 maize populations from tropical and subtropical regions under the ecological conditions in zhengzhou, henan. results showed that the significant delaying days to shed and days to silk, discoordinating for the development of male and female, higher plant and ear height, more leaf numbers, high barreness, worse performance of ear traits compared with the ck ( temperate population ) were found, which showed the tropical and subtropical populations could not be utilized directly under the ecological conditions in zhengzhou. by using selection and improvement the tropical and subtropical populations can be used to broaden the genetic base of temperate maize breeding, beause of the greater genetic variation and higher selection potential within each population. the different performances of the sensitivity to photoperiod were observed among different tropical and subtropical populations and different traits. the asi, time to silk, ear height, leaf numbers, grain yield per ear could be used as the good evaluation traits for identifying the sensitivity to photoperiod
對8個熱帶、亞熱帶玉米群體在鄭州生態條件下的表現進行鑒定和評價，結果表明，熱帶、亞熱帶群體散粉、吐絲期顯著延遲，雌雄不協調，植株和穗位高、葉片數增多、空稈率高，結實性差，果穗性狀均明顯劣於溫帶對照，在鄭州生態條件下不能直接利用，但是群體內具有較大的遺傳變異和選擇潛力，可以用來拓寬現有玉米種質的遺傳基礎；不同熱帶、亞熱帶群體的光周期敏感性不同；不同性狀對光周期反應的敏感程度不同， asi 、吐絲期、穗位高、葉片數、穗粒重可作為鑒定光周期敏感性的較好指標 -
Yunjingyou 1 was bred by using yintiaojing a slim grain variety from shanghai, as maternal parent and hexi 34, a yunnan variety with high yield, strong blast resistance and cold endurance as paternal parent for five years and seven generations selection
摘要雲粳優1號是用細長粒型粳稻新品系銀條粳作母本，高產、高抗稻瘟病、耐寒的合系34號作父本進行雜交，經過5年7代選育而成。 -
These restorer lines showed both stable and uniform agronomical characters and a good restoring ability, and their testcrossing f1 hybrids had a strong heterosis in grain yield, which indicates that the recurrent selection provides an effective way in breeding of three - line japonica restorer lines and makes it possible the commercial production of three - line japonica hybrid rice in north cold rice growing area in china
這些恢復系性狀穩定，恢復度好，測交f1代產量優勢明顯，表明輪回選擇為粳稻恢復系選育提供了一條新的技術途徑，並使三系雜交稻在北方寒冷稻作區的大面積推廣成為可能。 -
The sub - model for variety selection was established by qualifying the relationships of variety characters to eco - environments through the combined effects of disease and insect resistances, yield and quality traits
品種選擇基於品種特性與生態環境之間的定量化關系，計算棉花抗病抗蟲性及產量和品質指標的綜合影響。 -
In this paper, advance in the application of marker - assisted selection, interspecific hybridization, transgenic technology to select the peanut breeds of resistant to insect pests and diseases, drought - tolerant, quality, short duration high 、 yield in the foreign countries is reviewed
總結了近些年來國際上應用分子標記、種間雜交、轉基因技術等方法在選育花生抗病蟲、抗旱等多抗性及優質、早熟、高產新品種等方面取得的最新進展。 -
According to their fiber qualities and yield - character performances, eight f1 combinations from the cross between high quality fiber property varieties ( strains ) and insect - resistant varieties ( strains ) were evaluated to determine the best combination by using grey system principles and methods, which will help to improve selection efficiency and to accelerate cotton breeding process
摘要利用優質陸地棉品種（系）和常規抗蟲棉品種（系）配製雜交組合，根據f1代產量、主要產量性狀及纖維品質性狀表現，運用灰色評判原理與方法分析比較其灰色綜合評判值，以確定優良組合，為優質高產抗蟲雜交棉的選育提供理論依據。 -
In 1952, h. m. markowitz published an article called " asset selection : efficient decentralization of investment ". he adopted the expectation yield of risk asset, and, at the same time. adopted variance ( or standard deviation ) which represents risk, for the study of selection and combination of asset. this is called the jumping - off point of the modern times asset combination theory by financial circles. after then, william. f. sharpe advanced capital asset pricing model. the study of modern tunes asset combination theory in our country began in 1990 when markowitz and sharpe gained the nobel prize, such as fei fang yu ( 1994 ) and bei duo guang ( 1996 ) published several kinds of bookmakings which introduced modern times asset combination theory, simultaneity, yang gui yuan ( 1995 ), tang xiao wo ( 1994 ) published several articles which discussed the ways how to comformate efficient asset combination in modern times asset combination theory
之後，威廉?夏普（ william . f . sharpe ）又提出了資本資產定價模型。我國對現代資產組合理論的研究是從1990年馬柯維茨和夏普等人獲得諾貝爾經濟學獎開始的，如費方域（ 1994 ）和被貝多廣（ 1996 ）等出版了幾種介紹現代資產組合理論的著作。楊桂元（ 1995 ） 、唐小我（ 1994 ）等發表了不少討論現代資產組合理論中構造有效資產組合理論方法的文章。 -
Core losses are caused by an alternating magnetic field in the core material, thie losses are a function of the operating frequency and the total magnetic flux swing, the total core losses are made up of three main components, hysteresis eddy current and residuallosses, these losses vary considerably from one magnetic material to a - nother, applications such as higher power and hither frequency switching regulators and rf designs require careful core selection to yield the highestinductor perfor - mance by keeping the core losses to a minimum
鐵損是由於在鐵芯中的變更磁場院所造成，這個損失與操作頻率及總流動的磁通量有關，總鐵損由三個成份組成，磁滯損，過流損及殘留損，這些損失因磁性材料不同而異，在如高功率切換調整器和rf的設計需要小心選擇鐵芯種類以降低鐵損使電感的表現最佳。 -
After hybridization between wild rice with high disease resistance and high heritability and cultivated rice with high yield and other good agronomic characters according to the breeding aim, new quality germplasm could be promptly obtained by anther culture and then strictly selection
按育種目標選擇抗病力強，傳遞力高的野生稻與豐產、農藝性狀優良的栽培稻雜交，通過花藥培養並對後代實施嚴格選擇，可迅速獲得新的優質源。 -
Analysis of yield elements for super high - yielding wheat varieties with different spike type and selection strategy in shandong province
山東省不同穗型超高產小麥產量構成因素分析與選擇思路 -
The wider selection of product structure and yield provides many choices to suit the investment objectives of portfolio diversification and yield enhancement of retail investors under the current market conditions.
更多元化的產品結構及收益為一般投資者提供更多選擇，以迎合一般投資者在現時市場狀況下的投資目標，使組合多元化及提高收益。
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