The thesis had done the theories analysis in detail and built the relevant mathematics models aiming at the mechanics characteristic about the lodging of stalk, the elastic and plastic deform of stalk under the action of the transverse loads, the mechanics condition which causes stalk pushed, the relation between the speed of unit and the surface radius of ski, the relevant location between the thickness of the compressed stalk and action location of load, the relevant location between the mating device and plough, the coefficient of overturning soil under the thickness of the compressed stalk and so on. in addition, the computer aided analysis and simulating experiments in field were acted by choice
本文對秸
稈自倒伏力學特性;橫向載荷作用下的莖
稈彈塑性變形與秸
稈被推倒的力學條件;機組作業速度與滑撬曲面半徑的關系;秸
稈壓實厚度與加載作用點的相對位置;配套裝置與犁體相對位置;秸
稈壓實厚度下的翻垡系數等,進行了較詳細的理論分析並建立了相關數學模型。在此
基礎上,本項研究還選擇性地進行了計算機輔助分析和田間模擬試驗。
On the basis of research on com harvesters at home and abroad, a double head of picker and forage for sell - walk corn harvester should be designed. in this article, the mechanical characteristics of cobs and straws on com plant are analyzed
在國內外玉米聯合收獲機研究的
基礎上,設計研製出一種用於自走式玉米聯合收獲機上集果穗和莖
稈同時收獲的復式玉米聯合收獲臺。
In the thesis, the general morphological and biological characters of chloropinae are given. 35 species belonging to 3 genera are described, including 23 new species : mepachymerus grandis sp. nov.,
文中概述了
稈蠅亞科的生物學及研究意義、研究歷史及現狀,並描述了
稈蠅亞科的
基本特徵及分類常用特徵。
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
On this base, a new water managemat pattern of orchard on weibei highland, “ grass planting beween apple tree rows + wheat straw mulching on the region of apple tree roots ”, was put forward
在此
基礎上,提出了渭北旱地果園各種年型下「果樹行間生草+樹盤秸
稈覆蓋」的水分管理新模式。
Stripper header invented by afrc uk, mounted on grain combine harvester showed its two deficiencies in china : leaving the stripped straw stan ding without windrowing and relatively high free grain loss especially working a t lower ground speed
英國發明的懸掛在聯收機上的摘脫臺在中國使用中有兩個缺點:摘脫后的
基稈未能切割摟集成條鋪和落粒損失,尤其在低速時較大。
Abstract : stripper header invented by afrc uk, mounted on grain combine harvester showed its two deficiencies in china : leaving the stripped straw stan ding without windrowing and relatively high free grain loss especially working a t lower ground speed
文摘:英國發明的懸掛在聯收機上的摘脫臺在中國使用中有兩個缺點:摘脫后的
基稈未能切割摟集成條鋪和落粒損失,尤其在低速時較大。
This paper introduce, on the basis of consulting a lot of data, during to the question of shortage of energy source in the world and adjusting to structure of energy source under the new condition of 21 century and the question of tar during the crop stacks - based biomass gasification
本課題是在查閱大量資料的
基礎上,針對世界范圍內能源缺乏問題和21世紀新形勢下的能源結構調整問題以及生物質秸
稈氣化過程中產生的焦油等問題而提出的。通過查詢可知目前國內外還沒有人涉足這方面的研究。
Dwarf male - sterile wheat is a taigu genie male - sterile wheat with dwarf marker, and an efficient method of population improvement, and has vast application prospects in germplasm creation
摘要矮敗小麥是矮
稈基因標記的太谷核不育小麥,是理想的群體改良工具,在種質資源創新方面具有很大的應用前景。
This construction, adopting biochemical straw - feed invented by itself, on one hand reduces the cost of breeding, on the other hand takes a good use of sweat straws
基地採用自研專利技術秸稈生化飼料及秸稈生物顆粒飼料飼喂牲畜,收到了良好的效果,一方面降低了養殖成本,另一方面使秸稈資源得到了合理有效的利用。