论文部分内容阅读
答:目前推广的超级稻品种(组合)因为生育期比较长,对氮肥需求量大,而且农民平常施用钾肥太少,加上有些品种在遗传上具有粳稻血缘,所以,和其他水稻品种比较,超级稻容易感染水稻纹枯病、稻瘟病和稻曲病等。超级稻种植密度偏稀,前期田间裸露面积大,杂草生长迅速;后期生长繁茂,容易
A: At present, the super rice varieties (combinations) to be popularized because of relatively long growth period, large demand for nitrogen fertilizer, and too little peasants’ application of potassium fertilizer as usual, and some of the varieties genetically possess the bloodline of japonica rice. Therefore, compared with other rice varieties, Super rice is susceptible to rice sheath blight, rice blast and rice false smut. Super rice planting density is too thin, pre-field exposed area, weeds grow rapidly; late growth and prosperity, easy