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。
It have given great harm to our economic and culture and zoology and human ’ s healthness so on. but it was later realatively to be made for the law and rule about the inbreak of outer species in our country. by far, we have not made a special law or rule to prevent the inbreak of outer species. even some law and rule about it have much problem and the system of managing is also confusion. to protect the diversity of biology and human ’ s healthness and the persistent development of economic and society, we should establish correct thought for legislation and make special law and rule to prevent the inbreak of outer species, and complete our existing law and rule, finally, form mult - departmental and harmony system of managing, and establish perfect law system to prevent more harmness caused by outer species
到目前為止,我國還沒有一部專門
針對防治外來物種入侵的法律法規,相關的法律法規也存在很多的問題,且管理體制也比較混亂。為了保護生物多樣性,人類的健康和經濟社會的可持續發展。我們應該確立正確的立法指導思想,制定專門
針對外來物種入侵的法律法規並完善我國現有的法律法規,形成多部門的協調管理體制,構建一個健全的完善的防治外來物種入侵的法律體系,以防止外來物種對我國的進一步危
害。
The buttocks are a good place for intramuscular injections because there are relatively few major blood vessels, nerves and bones that can be damaged by a needle
臀部是進行肌肉注射的理想「場所」 ,因為經過那裡的重要血管神經及骨骼相對較少,所以
針頭不會對它們造成什麼傷
害。
Directed against the jump disease at bridge abutment in the high - grade highway, for the first time, the paper puts forward the treatment method of the flexible approach slab, which is consisted of geocell
針對我國高等級公路路橋過渡段橋頭跳車病
害嚴重的現狀,本文首次提出了由土工格室構成的楔型柔性搭板處治技術。
Laird pointed out that our effort in vietnam was certain to suffer if we became involved in a tit-for-tat with north korea.
萊爾德指出,如果我們捲入同北朝鮮的
針鋒相對的斗爭,我們在越南的戰事肯定受到損
害。
Well-directed tittletattle may easily causes its victim to lose his or her livelihood.
針對性很強的聊天,很容易使受
害者丟掉飯碗。
But in pharming, larger numbers of computer users can be victimized because it is not necessary to target individuals one by one and no conscious action is required on the part of the victim
而在無誘餌釣魚欺騙中,由於它不是一個一個地
針對個人,受
害方絲毫不會懷疑這些行為,所以會有大量的計算機用戶受
害。
Pinhole on shot-hole damage is never structurally significant.
針孔和蛀洞所造成的危
害對結構的影響不大。
The most severely damaged will be the canadian low arctic tundra ; the wooded ural mountain taiga in russia ; the central andean dry puna in chile, argentina and bolivia ; the daurian steppe of mongolia ; the savannah of north - east india and nepal ; and the fynbos of southern africa
受
害最嚴重的將是加拿大的下北極苔原,俄羅斯樹木繁茂的烏拉爾山
針葉林,智利、阿根廷和玻利維亞安第斯山脈中部的乾冷高原,蒙古的乾草原,印度和尼泊爾兩國東北部的熱帶稀樹草原,非洲南部的高山硬葉灌木群落。
In allusion to this problem, detailed investigations were made in this article. on the base of these data, we analyze reasons of scathes of bridges. local damage of bridges is much serious
橋樑上部結構的損壞造成了其使用壽命的縮短,本文
針對這一問題,作了詳細的調研,並在此基礎上對上部結構產生病
害的原因進行了分析。
The sedative had left him with an acute headache, and his stomach was raw.
鎮靜劑的藥性過了,頭里痛得厲
害,胃內有如
針刺。
The early american chinese immigrants encountered severe hurts and persecution disposed by american racists, including the federal law of excluding the chinese in 1882. the chinese kids was refused to go to local public schools, or had to go to the separated school. in such a situation, american chinese had to established their own schools of elce in america, especially in san francisco and hawaii
首先介紹早期華人赴美的歷史背景和生活狀況,最早的華文教育概況;同時也敘述了自華人到來以後,美國所掀起的
針對華人的一次次排華浪潮(包括制定了排華法律) ,以及由此造成的對華人的嚴重傷
害。
A stripping uint with the cross - flow fan was developed, aimed to reduce the grain losses at the rear of the stripping drum reduce the blocking to the air outlet sifter and diffuse dust. this dissertation gives overall scheme of the rig and had mad experimental study
針對非氣吸式割前摘脫裝置在收獲作物時,出風口篩面發生堵塞使裝置內流場變差,導致裝置的落粒損失率過大;以及出風口處煙塵四散,影響了駕駛員的視野和危害工作人員的身心健康等生產中存在的問題。