摘要
为了探讨喷施立丰灵对直播稻抗倒特性及产量的影响,以‘Y两优1号’为材料,分别进行2种施氮量(高氮与适氮),同时在拔节前7d喷施立丰灵,以不喷施为对照。结果表明,喷施立丰灵后,增大穗下第3节间的长度,降低穗下第4、5节间长度,增加茎秆粗度和壁厚,尤其第5节间,从而显著增强茎秆的抗折力(P<0.01),降低倒伏指数,提高了植株的抗倒伏能力。另外,喷施立丰灵后,植株高度增加,剑叶和倒二叶的叶长减小,叶宽增加,而倒三叶的叶长、叶宽均增加,上三叶夹角变小,改善了植株形态,提高了千粒重、穗粒数和产量,理论产量在高氮和适氮处理下分别比对照增加6.57%和7.03%。因此,在施用适量氮肥的基础上,配合喷施立丰灵可以作为直播稻防倒、高产的重要栽培措施。
The effects of plant growth regulator Lifengling on lodging resistance properties and yield of direct sowing rice was studied under different fertilization patterns.The tested rice variety of Y liangyou No.I was treated with 2fertilization patterns(high amount of nitrogen and appropriate amount of nitrogen)and at the same time,was sprayed with plant growth regulators Lifengling at 7days before jointing stage.The spray of regulators reduced the internode length from the fourth to the fifth node below ear and increased the stalk diameter and wall thickness,especially the fifth internode.It increased the breaking resistance while reduced the lodging index of rice significantly(P<0.01)to strengthen the lodging resistance of rice.The application of the regulators increased the plant height,leaf width,and the angular separation between leaf and stalk,reduced the length of flag,second and third leaf,and improve the plant morphology.The thousand kernel weight,the number of grain per ear,and rice yield increased owing to the application of the regulator.The theoretical outcomes increased by 6.57% and7.03%(P<0.01)compared with controls at high amount of nitrogen and appropriate amount of nitrogen,respectively.So spraying of Lifengling at 7day before jointing stage,combining with appropriate amount of nitrogen fertilization,would be an important cultivation practice to lodging resistance and high yield of direct sowing rice.
出处
《长江大学学报（自科版）（中旬）》
CAS
2014年第4期1-3,7,共4页
Journal of Yangtze University(Nature Science Edition)
基金
国家自然科学基金项目(30771269)
湖北省重点(优势)学科作物学(长江大学)资助项目
关键词
直播稻
立丰灵
抗倒特性
产量
direct sowing rice
lifengling
lodging resistance
yield
