The paper fristly compared the fertile soil with the incinerated sterile soil on the number of micro - algae, soil ph value, soil organic matter soil available phosphorus and soil nitrogen. and then, the author put fertile soil, which included micro - algae, proportionally into sterile samples and cultivated them respectively under illumination condition ( micro - algae can live and reproduce ) and dark condition ( micro - algae will die in some time ). the above indices were measured in 0, 30, 60 and 90days respectively, the analyse of the interrelation between the change of micro - algae ' s number and the changes of soil ph value, soil organic matter, soil available phosphorus and soil nitrogen indicated : ( l ) soil micro - algae which were native to fertile soil conld adapt to the changed circumstance and light acted as a decisive role to the distribution of soil micro - algae. under dark condition, the micro - algae ' s number declined gradually and went to zero in the end, while under illumination condition, on the 90th day, the micro - algae ' s number of per gramme was 6 - 7 times more than that of the beginning
本文首先對肥沃土壤與經高溫焚燒后的貧瘠土壤中的微藻數量、土壤ph值、有機質含量、有效磷含量和全氮量進行比較研究,然後將包含微藻的綠化苗
圃地肥土按不同比例接
種進入貧瘠土樣中,分別在光照條件和黑暗條件下進行培養,在0天、 30天、 60天和90天分別檢測以上指標,比較有光條件和無光條件下,即有藻條件和無藻條件下貧瘠土樣所發生的變化,並分別對微藻數量的變化與土壤ph值、有機質含量、有效磷含量和全氮量的變化之間做相關性分析,以評估肥沃土壤中的微藻接
種進入貧瘠土壤后的生長情況以及對貧瘠土壤的改良作用。研究結果表明: ( 1 )土壤微藻對環境有較強的適應能力,且光照對其分佈起了決定性的作用。
Boda ' s nursery sclence base not only provides all kinds of best flowers and plants, but also gives you a place full of flowers perfume and birds singing
公司苗
圃科研基地不僅將為您提供品
種繁多、質優品高的花卉苗木,而且還將為您提供草木蔥郁、鳥語花香的休閑空間。
The fruit characters of grape varieties collected in zhengzhou germplasm repository are characterized and evaluated in this paper
摘要對鄭州果樹研究所國家葡萄
種質
圃內的主要葡萄栽培品
種的果穗和漿果的主要經濟性狀進行了鑒定評價。
Most nurseries sell certified trees which means that the trees have been checked and identified by state inspectors as true to name.
多數苗
圃都出賣合乎標準的苗木,這些苗木都經過國家檢驗員的檢查鑒定,合乎品
種標準。
They cultivated maize, beans, squashes, and tobacco, in garden beds.
他們在園
圃的土壇上
種植玉蜀黍、菜豆、南瓜和煙草。
Ecological features, function indicators and social - human impact together constitute the fundermental system of regional ecosystem health assessment. haxi forestry center is located in tianzhu of gansu province. in view of the natural conditions, land use type and forest map, we classify the research area into 15 landscape types
甘肅天祝縣哈溪林區位於祁連山東段,依據哈溪林區的自然條件、土地類型和林相圖,將研究區劃分為苗
圃,未成林地,宜林地,農田,牧草地,荒地,青海雲杉林,祁連圓柏,針葉混交林,楊類闊葉林,紅樺、榆、山楊硬闊林,針闊混交林、灌木林、疏林地和闊葉混交林等15
種景觀類型。
This usually means a wider spacing than would be used in an ordinary commercial nursery for the same species.
這通常意味著要比正常生產性苗
圃的同樣樹
種採用較大的株行距。
Some of the group s estates have plant nurseries to encourage residents to conserve the environment
集團旗部份屋苑設有
種植園
圃,鼓勵住戶愛護環境。
Dong a, the male sterile line of cotton discovered in 1972 from a pollenless mutant of cotton variety dongting no. l, is an ideal materials used to study the pollen - specific genes during anther development. the fertile individuals and its pollenless mutant have a highly homogeneous genetic background except for the male sterility
棉花洞a雄性核不育系是1972年從洞庭一號棉花原
種圃中發現的突變體,不育度高且穩定,可育與不育花粉在單核期以前發育同步,是研究棉花花藥與花粉發育相關基因的理想材料。
Some developed countries have been exploring mechanized ways of seedling - growing depending on their strong economic forces, but it is a long way for them to go to be sure that the technique could be used for the industrial production in large scale
(如番茄, 4天開始生根, 20天開花結果,枸杞當年在苗
圃地就開花結果,脫毒薯一葉一芽材料從接
種至40天就能分化出小薯,當年栽培可直接在大地收獲大脫毒薯。
Generally they find the herbs already grown at a local nursery as they have not the time in any one place to start the plants from seed
通常情況下,他們會在當地苗
圃中找到藥草的幼苗,因為他們在任何地方都沒有時間足夠從
種子開始
種植。
Plant nurseries and organic farm plots in some residential estates
于部分住宅屋苑設有機農圃和親子種植樂園。