论文部分内容阅读
水稻的产量构成因素是由单位面积的穗数,每穗的实粒数和粒重构成的,而单位面积的穗数又来源于每亩的基本苗和有效分蘖数。因此弄清水稻分蘖这一重要营养生长阶段的生物学特性,掌握好分蘖的发生规律,根据不同情况,制订合理密植规划和其它技术措施,采取有效的方法,促早发,争多穗,这对提高水稻单位面积的产量是甚关重要的。 在正常的情况下,稻株都能发生分蘖。从主茎上发生的分蘖称第一次分蘖;第一次分蘖上再发生的分蘖称第二次分蘖;依次类推。据沔阳县排湖水稻原种场观察,早稻
The yield components of rice consist of the number of panicles per unit area, the number of solid grains per panicle and the grain weight, while the number of panicles per unit area is derived from the basic seedlings per acre and the effective number of tillers. Therefore, it is necessary to clarify the biological characteristics of rice tiller at this important vegetative growth stage and to master the law of tillering. According to different situations, formulate reasonable planting density plan and other technical measures and take effective measures to promote early development and fight more spikes. It is very important to improve the yield per unit area of rice. Under normal conditions, tillers can occur in rice plants. The tillering from the main stem is called the first tillering; the tillering on the first tillering is the second tillering; and so on. According to Mianyang County Pao Lake rice seed field observation, early rice