追施肥料对籼稻不同时期抗倒性影响的研究  

A Study of Effect of Fertilizer Topdressing on Loding Resistance of Indica Rice in Different Growing Periods

作　　者：王向平 冯和平 黄义德[3] 

机构地区：[1]洛阳市洛龙区农林技术推广站,河南洛阳471023 [2]河南省洛阳市第四十一中学,河南洛阳471023 [3]安徽农业大学农学院,安徽合肥230000

出　　处：《宁夏农林科技》2015年第1期39-42,64,共5页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金：国家粮食丰产科技工程项目(2006BAD02A06-16)

摘　　要：探讨不同叶龄期追施N、K肥对水稻抗倒伏的影响。以籼型杂交稻两优6326为材料,通过不同叶龄期追施N、K肥,研究水稻茎秆的生长发育与植株的抗倒性相关性。结果表明:基部节间的健壮程度与水稻的抗倒伏关系为:基部第二节间>基部第一节间>基部第三节间;对茎秆倒伏指数的影响大小为:基部节间干重>基部节间壁厚>基部节间长度>基部节间内径,而节间外径大小与植株抗倒关系不密切。N肥试验中,倒伏指数最小的是倒5叶期施肥,最大的为倒1叶期施肥;K肥试验中,倒伏指数最小的是倒2叶期施肥,最大的为倒3叶期施肥,说明N、K肥不能同一时期施,应根据作物的生长期施肥。A discussion was made on the effects of topdressing of nitrogen and potassium fertilizer on lodging resistance of the rice in different leaf age period. With the Indica hybrid rice two excellent 6326 as the material and the topdressing of nitrogen and potassium fertilizer was carried out in different leaf age period to study the correlation between the growth and development of the stem of the rice and the lodging resistance of the plant. The results showed that the order of the correlation between the strong and healthy level of the basal internodes and the lodging resistance of the rice was： the second basal internode〉the first basal internode〉the third basal internode; the order of the effects on the stalk lodging index was ： basal internode dry weight〉basal internode thickness〉basal internode length〉basal internode inside diameter. The correlation between the internode outside diameter and the lodging resistance of the plant was not close. In the nitrogen fertilizer test, the stalk lodging index was the least when the topdressing was made in the negative fifth leaf age period and the stalk lodging index was the biggest when the topdressing was made in the negative first leaf age period. In the potassium fertilizer test, the stalk lodging index was the least when the topdressing was made in the negative second leaf age period and the stalk lodging index was the biggest when the topdressing was made in the negative third leaf age period. It shows that the nitrogen fertilizer and potassium fertilizer cannot be applied at the same time and should be applied according to the growth period of the crop.

关 键 词：水稻 不同叶龄期 氮肥 钾肥 抗倒性 

分 类 号：S511[农业科学—作物学]