| 1. | Comparative study on the drought - tolerance between 4 high yield paddy rice varieties and brazil upland rice variety
4个水稻高产品种与巴西陆稻的耐旱性比较研究 |
| 2. | The high yielding varieties gave higher yields at increased nitrogen levels but the rice quality was not comparable to that of some high quality varieties
氮水平提高时高产品种产量增加，但稻米品质比不上一些优质品种。 |
| 3. | Hyv is required to possess higher photosynthetic efficiency and respond to high rates of nitrogen fertilizer and resist to lodging as well as maximize yield components
高产品种要具备高光合效率、对高施氮量的反应、抗倒伏并使产量构成因素最大化。 |
| 4. | A hyv is required to possess higher photosynthetic efficiency and respond to high rates of nitrogen fertilizer and resist to lodging as well as maximize yield components
高产品种要具备高光合效率、对高施氮量的反应、抗倒伏并使产量构成因素最大化。 |
| 5. | It was strongly felt that the only way to dramatically increase rice production under these circumstances was the development of new high yielding varieties and cultural technologies
人们强烈感到，在这种条件下大幅提高水稻产量要开发新的高产品种和栽培技术。 |
| 6. | However , when the amount of nitrogen fertilizer increased with the use of high yield varieties , the traditional method failed to contribute to expecting high yield and caused part nitrogen fertilizer wasted
然而使用高产品种施氮量提高后，传统施肥方法不能得到预期产量并造成部分氮肥浪费。 |
| 7. | After selected various high yielding and hybrid varieties , their nutrient uptake pattern , interaction among fertilizer , varieties and plant density should be investigated
近年来，我国选育出一批主要作物的高产品种和杂交种，应当研究它们的需肥特性，研究施肥与这些新品种及其种植密度等不同措施的关系。 |
| 8. | The use of high yield varieties caused a complete change in technology , involving the cultural practices , the use of fertilizers , a better utilization of land , a controlled water supply and effective pest control and so on
种植高产品种植高产品种要求彻底改变技术，包括栽培措施、施肥、更好地利用土地、供水控制、病虫害有效防治等等。 |
| 9. | Therefore , after tasseling whether the nutrient supply is adequate or not will greatly influence the formation of grains , especially for the high - yielding cultivars of which the amounts of accumulative dry matter in reproductive organ account for a wide proportion of the total amount , so it is very important to apply adequate amount of fertilizers in earring stage
因此，抽雄后养分供应是否充足将极大影响籽粒形成，特别是高产品种，生殖器官中干物质积累量占总积累量的很大部分，所以抽雄期充足施肥至关重要。 |
