| 1. | This kind of pear is the result of crossing two different breeds of pears .
这种梨是另外两种梨的杂交品种。 |
| 2. | It would also be much faster than the years it takes to grow hybrids
遗传技术比培育数年的杂交品种要快许多。 |
| 3. | Comprehensive hybrid variety
综合杂交品种 |
| 4. | The remaining 90 % is harvested from trees of the forastero family , with its many hybrids and varieties
90的可可豆属于福拉斯特洛可可这一大类，其中包含很多杂交品种。 |
| 5. | The optimum nitrogen level was about 150 kg / ha for japonica varieties and 180 kg / ha for indica - japonica cross varieties
粳稻品种的最优施氮量为150公斤/公顷，而籼-粳稻杂交品种为180公斤/公顷。 |
| 6. | The amount of nitrogen fertilizer had been steadily increased along with the development of the indica - japonica cross varieties during the last 15 years
过去15年中随着籼-粳杂交品种的发展，氮肥用量持续增长。 |
| 7. | Therefore , rice farmers grow only high quality varieties which have similar desirable agronomic characters to those of the indica - japonica cross varieties
因此，稻农只种具有与籼-粳杂交品种农学特性相同的优质品种。 |
| 8. | Rice yield reached the maximum at a leaf area index of seven to nine in indica - japonica cross variety , and at a leaf area index of about five in japonica variety , respectively
籼-粳稻杂交品种的叶面积指数为7 ~ 9时水稻产量最高而粳稻品种最佳叶面积指数为5 。 |
| 9. | The experiment of cultural techniques for attaining high yield contained three factors ( hybrid , planting density and n application rate ) each at two levels , which had eight treatments in total
高产栽培技术试验包括三个因子（杂交品种、种植密度和施氮量） ，每个因子设2个水平，共为8个处理。 |
| 10. | Traditional techniques of plant breeding involve crossing two plant varieties , each with desirable characteristics usually referred to as traits and selecting the best of these crosses
传统的植物育种技术是将两种植物其中每种植物都具有人们想要的特征通常称之为性状进行杂交，然后选择出最好的杂交品种。 |
