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氮素营养条件仍然是当前决定水稻高产的中心问题。为掌握粳型杂交水稻营养特性及确定施肥措施,在1977—1980年开展了粳型杂交水稻氮肥施用技术研究。试验方法及过程本项研究的田间试验布置在沈阳郊区和大洼县。沈阳试验田为草甸土型水稻土;大洼试验田为滨海盐渍性水稻土。土壤农化基本性质如表1。小区面积40～60平方米,三次重覆,未施有机肥料。塑料薄膜湿润及旱育苗。历年约于3月末(大洼)至4月初(沈阳)播种,5月
Nitrogen nutrition is still the central issue that determines the current high yield of rice. In order to understand the nutritional characteristics of japonica hybrid rice and to determine the fertilization measures, the nitrogenous fertilization of japonica hybrid rice was studied in 1977-1980. Test Methods and Procedures The field trials in this study were arranged in Shenyang suburbs and Dawa County. The experimental field in Shenyang is meadow-type paddy soil; the experimental plot in Dawa is coastal salty paddy soil. Table 1 shows the basic properties of soil agriculture. Community area of 40 to 60 square meters, three times repeated, no organic fertilizer. Wet plastic film and drought nursery. Calendar year around the end of March (Dawa) to early April (Shenyang) sowing, May