论文部分内容阅读
为加快种子繁殖速度和育种进程,每年10月初,北方各育种和种子部门开始到海南岛进行南繁。海南岛的生态条件与大陆特别是北方差异较大,土壤瘠薄,冬季干旱少雨,病虫鸟害较严重。因此,种好、管好种子繁育回应抓好以下几个主要环节。 1.整地。在土壤干旱的情况下,整地前先灌一次水,然后整地,整地必须细致,尤其是水稻茬,力求土块细碎,地平,使于灌水。 2.播种。一般为平播,个别采用垅作,行距50厘米,株距离秆型15厘米,中矮秆10厘米。播种深度为3～5厘米。开沟后先将事先准备好的口肥与农药(呋喃丹)一同撒入沟中,略覆一层薄土,然后播种、覆土。根据墒情决定是否踩格子或镇压。 3.施肥灌水。结合犁地施基肥,播种时施口肥,保证苗期生长所需求的养分。如果不施口肥又
In order to speed up seed multiplication and breeding process, in early October each year, breeding and seed departments in the north began to travel south to Hainan Island. Hainan Island ecological conditions and the mainland, especially the north of the larger differences, infertile soil, winter drought, pests and birds more serious. Therefore, good species, good seed breeding response do a good job following several major links. Site preparation In the case of soil drought, before the preparation of soil irrigation water, and then site preparation, site preparation must be meticulous, especially rice stubble, and strive to parcels, leveling, to irrigation. Sowing Generally flat-screen, individual use of cedar, line spacing 50 cm, 15 cm from the stalk type plant, 10 cm in the dwarf. Sowing depth of 3 to 5 cm. After ditching first prepared mouthfeel and pesticide (carbofuran) drenched into the ditch, slightly covered with a thin layer of soil, and then sown, soil cover. Determine whether to put on plaid or crack according to the moisture content. 3. Fertilizer irrigation. Combined with plowing of basal fertilizer, sowing fertilizer, seedlings to ensure the growth of nutrients required. If you do not apply fat and fat