摘要
沙地衬膜水稻采用无土栽培原理,施肥以化肥为主。适宜的N肥能显著促进沙地衬膜水稻营养体的生长,P肥则对水稻后期籽粒灌浆结实有明显效应。N、P配施较单施N、P处理籽粒产量和蛋白质含量有显著提高。在本试验条件下,沙地衬膜水稻栽培中,纯N最适施用量为144.7 kg/km2,最佳N、P配比为1∶0.502,以使籽粒产量、蛋白质含量、单位面积蛋白质产量均表现较高。根据沙土特点和水稻生长发育规律,衬膜水稻施肥应坚持少量多次的原则,N肥分4次施入,P肥基施为主,K肥少量追施,另须基施S i等微肥。基肥采取沟深施,追肥撒施,采取前促、中控、后补的原则,主攻分蘖肥和穗粒肥。
Cultivating rice in film-bottomed sandy land adopt the principle of soilless culture, so the main fertilizers be used are chemical fertilizers. The proper quantities of nitrogen fertilizer can improve the vegetative growth of rice cultivated in film-bottomed sandy land, while phosphorus fertilizer has obvious effects on seeds setting and filling. Combining nitrogen and phosphorus fertilizer can greatly increase seed yields and protein contents, Under the condition of this test, the best quantities of nitrogen fertilizer are 144.7 kgN/hm^2,the best ratio of N and P is 1：0. 502,for the seed yield, protein contents and protein yield of unit area are all higher. According to characters of sand soil and growing pattern of rice cultivated in film-bottomed sandy land, fertilizers should apply in many times and small amounts, nitrogen fertilizer can apply in 4 times, phosphorus fertilizer apply mainly as base fertilizer, potash fertilizer apply as topdressing, also fertilizers with trace-element Si, Mg and Mn should be applied as base fertilizer. The base fertilizer apply deeply in furrows, topdressing scatter in fields mainly in tillering and earing stages.
出处
《水土保持学报》
CSCD
北大核心
2006年第1期139-142,共4页
Journal of Soil and Water Conservation
关键词
榆林沙区
衬膜水稻
N
P肥
施肥效应
施肥技术
Yulin sandy area
rice cultivated in film-bottomed sandy land
nitrogen and phosphorus fertilizer
fertilization effect
fertilization technique
