摘要
对杂交稻Ⅱ优明86进行施氮量试验，结果表明，施氮量以195—240kg／hm^2产量高。在一定施氮量范围内，随施氮量的提高，茎蘖数、叶面积指数、干物质积累提高，植株和稻谷的含氮、磷、钾率也提高；氮肥过多后，由于氮、磷、钾比例失调，影响了养分平衡的吸收，茎蘖数、叶面积、干物质积累减少，植株和稻谷的含氮、磷、钾率下降。因此，生产上高产栽培应掌握适宜的施氮量，水稻氮、磷、钾吸收率提高，产量高。
The result of the experiment of applying nitrogen to Super - rice Ⅱ Youming 86 ; nitrogen application rate; tiller numbers ; leaf area; dry matters accumulation; absorption of nitrogen, phosphorus and potassium Youming 86 indicates that the yield increases with the application of nitrogen at the level of 195 - 240kg/hm2. within certain limits, the increase of nitrogen application results in the increase of nitrogen, phosphorus and potassium ratio of plants and rice as well as the increase of tiller numbers, leaf area index and dry matters accumulation. Excessive application of nitrogen affects the ratio imbalance of nitrogen, phosphorus and potassium, the absorption of nutrient balance, the decrease of nitrogen, phosphorus and potassium ratio of plants and rice as well as the tiller numbers, leaf area index and dry matters accumulating. Consequently, the appropriate application of nitrogen is a key factor in cultivation. The increase of paddy rice yield is based on the effective absorption of nitrogen, phosphorus and potassium.
出处
《宜春学院学报》
2010年第8期87-88,129,共3页
Journal of Yichun University
关键词
Ⅱ优明86
施氮量
分蘖动态
叶面积
干物质积累
氮
磷
钾吸收
Ⅱ Youming 86
nitrogen application rate
tiller numbers
leaf area
dry matters accumulation
absorption of nitrogen, phosphorus and potassium
