摘要
以双季早稻陆两优996和双季晚稻天优华占为材料,研究在施钾量为135 kg/hm2和180 kg/hm2时不同施钾时期对产量和稻米品质的影响。研究表明,在2个施钾水平下均为m(基肥)∶m(蘖肥)∶m(穗肥)=5∶2∶3时的产量最高。穗期施钾有利于提高成穗率、促进茎鞘物质运转、提高剑叶的气-叶温差、延缓根系和叶片衰老。穗期施钾提高陆两优996的整精米率和垩白米率,但对天优华占的稻米品质没有影响。
With double season rice varieties Luliangyou996 and Tianyouhuazhan as the materials,the effects of potassium application time on yield and rice quality were studied under the levels of potassium application amount of 135 kg/hm2 and 180 kg/hm2.The results showed that the highest grain yield was the 5∶2∶3（basic∶tiller∶panicle fertilizer） treatment under both the potassium levels.The effective panicle forming rate,translocation amount of dry matter reserved in stem and sheath,temperature depression（difference between air temperature and flag leaf temperature） were increased by top-dressing potassium as panicle fertilizer,but a opposite effect was found for root and leaves senescence.The percentage of head rice and grains with chalkiness were increased by top-dressing potassium as the panicle fertilizer in Luliangyou996,but no effect in Tianyouhuazhan.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2011年第3期412-417,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家"十一五"科技支撑计划项目(2006BAD02A04)
江西省科技攻关项目(20051B020010)
农业部超级稻配套栽培技术集成与示范项目资助(2009-9)
关键词
双季稻
施钾时期
产量
稻米品质
double-season rice
potassium application time
grain yield
rice quality
