Referring to the achievements of conservation tillage on dry land farming, there is a series of work to be done to develop new tillage techniques to adapt to double cropping system of wheat and maize in shandong province. such work includes controlling the combine traveling along the line, return the stalk to the field after chopped, subsoiling being done in maize ' s growing stage. the advantage of subsoiling is to make the soil inter placed with soft and hard strips, which is good for decreasing runoff and vaporizing, and retaining rain
1 、保護性耕作條件下，普通小麥條播機的播種質量較差，小麥的田間出苗率比傳統耕作低9 . 3 ；保護性耕作小麥冬前地上部分的生長狀況也較傳統耕作小麥差；由於根系的生長條件較為優越，保護性耕作的小麥的根系生長旺盛、分佈廣，越冬後有利於小麥的地上部分生長，大量發生春季分蘗和次生根，
幼穗強烈分化，表現出較傳統耕作小麥強的生長優勢，產量提高6左右。
The 6 species of rhizome grass have lower earing percent, which in young tillers is more than the one in old tillers
6種禾草的抽
穗率均較低，
幼齡分蘗株抽
穗率大於老齡分蘗株。
Effects of sowing times on the spike differentiation of different wheat varieties under the climate of warm winter
暖冬條件下播期對不同類型小麥
幼穗分化的影響
The study on winter spike initiation in shenyang
沈陽地區冬小麥
幼穗分化規律研究
The small fishes, including c. auratus, c. erythropterus, h. leucisculus, p. parva, t. swinhonis and h. swinhonis, were abundant in the catch. p. parva and t. swinhonis had only one age class. the population of a. rivularis and s. nigripinnis had two age classes and most of them were one year old
魚類資源表現出一定的小型化趨勢，漁獲物中鯽、紅鰭原? 、 （ ?又魚） 、麥
穗魚、似（魚喬） 、黃（魚
幼）等小型魚類數量眾多，麥
穗魚和似（魚喬）僅有1齡，棒花魚和黑鰭?由2個年齡組組成，以1齡魚為主。
C. erythropterus, s. nigripinnis, a. rivularis, p. parva, h. leucisculus, t. swinhonis and h. swinhonisb were abundant. age structures of fishes were mainly 1 age class in the seine. p. parva, t. swinhonis, c. erythropterus and acheilognathinae, including r. ocellatus, r. lighti and p. imberbis, were the numerically dominant species
用圍網共採到19種魚，其中紅鰭原? 、黑鰭? 、棒花魚、似（魚喬） 、 （ ?又魚） 、麥
穗魚、黃（魚
幼）等小型魚類居多，以1齡魚為主，紅鰭原? 、似（魚喬） 、麥
穗魚和（魚旁） （魚皮）是優勢種群。
In the study, six different ecotype varieties of common wheat and f1 derived from 6 6 complete diallel crossing system were selected for the research on the characteristics and heterosis of spike differentiation. the results showed that heterosis existed in most key spike differentiation phases and varied with different ecotype varieties. heterosis of spike differentiation was positively correlated with heterosis of hybrid yield. finally, the author concluded that it was the best way to produce strong heterosis combination by selecting the mode of “ spring wheat winter wheat ” in huanghuai winter wheat region
對6個不同生態類型小麥品種及其完全雙列雜交f1
幼穗分化特點和
穗分化雜種優勢的研究表明，雜種
幼穗分化各主要時期普遍存在雜種優勢；不同生態類型組配方式的雜種
穗分化優勢不同；
穗分化雜種優勢與產量雜種優勢具有一定相關關系；黃淮麥區雜交小麥最佳生態組配方式為春性品種冬性品種。
Treatment of " zuoshangyi " and " shuanghong " as stocks and scions for each other and treatment of " zuoyouhong " as scions, " zuoshangyi " and " shuanghong " as stocks respectively showed " false living " and no plants
左山一和雙紅互做砧
穗、左優紅做接
穗、左山一和雙紅做砧木硬枝嫁接的催根
幼苗表現為「假活」 、不能育出苗木。
Studies on transformation of indica rice with bt - toxin gene mediated by agrobacterium tumefaciens precultured immature embryo and callus derived from young panicle, immature embryo and mature embryo were used as acceptor for genetic transformation mediated by agrobacterium tumefaciens, the transformation rate of the above acceptor was investigated respectively. the results showed that immature embryo after precultured for 4 ~ 6d was the best. in respect to the concentration of agrobacterium tumefaciens when calli were cotransformated in medium yeb, to agrobacterium tumefaciens eha 105, od value of 0. 8 was the best
採用農桿菌介導法將bt毒蛋白基因導入水稻同樣以上述兩種秈稻為主要研究材料，比較了分別以預培養的
幼胚和
幼穗、
幼胚、成熟胚來源的愈傷組織作為轉化受體的愈傷組織轉化頻率，結果表明預培養4 6天的
幼胚最適宜作為農桿菌介導轉化的受體；其次是來源於
幼胚和成熟胚的生長狀態良好的胚性愈傷組織。
Genetic analysis of young spike development of multispikelet wheat new line
1
幼穗發育遺傳分析
Correlation analysis of the tillering of winter wheat and the seeding time
冬小麥
幼穗分化與播期的相關性分析
Relation between young spike differentiation of ecotypes of wheat at different sowing date in spring and temperature and leaf emergence
不同生態型小麥春播條件下
幼穗分化進程與溫度和葉片出生的關系
Scion a shoot or bud from one plant that is joined to another plants with roots ( the stock ) by grafting or budding
接穗：通過嫁接或出芽將一株植物上的幼枝或幼芽與另一株具根（即樹干）植物相連。
