摘要
1998年采用田间小区 (5处理、3重复 )试验的方法 ,对直播水稻穗肥运筹与穗部性状的关系进行了研究 ,经方差分析和逐步回归分析 ,结果表明 :1)在叶龄余数 3.9、3.0、1.8和 0 .9时采用三、二、一元肥 4次“稳健促进法”(处理 1,6 6 6 .7m2施用三元复混肥 15.0 kg、磷酸二铵 [(NH4 ) 2 HPO4 ]7.5kg、尿素 [CO(NH2 ) 2 ]6 .0 kg和尿素 4 .0 kg) ,其结实一次枝梗数、每穗总粒数、每穗实粒数和小区实产明显增加 ,现存二次枝梗数有所增加 ,虽结实率明显下降 ,但仍达 93.9%。 2 )每穗实粒数与每穗总粒数均密切相关。其中 ,处理 1还与结实一次枝梗数密切相关 ,与现存二次枝梗数有重要关系 ,其一、二次枝梗兼顾协调 ,有利于穗大粒多 ;同时 ,总样本 (含处理 )还与结实一次枝梗数和处理密切相关。3)每穗总粒数与结实一次枝梗数和现存二次枝梗数均密切相关。 4 )现存二次枝梗数与结实一次枝梗数均密切相关。其中 ,总样本 (含处理 )还与处理密切相关。 5)
The relations between operational research of earing stage fertilizers in direct sown rice field and rice spike characters were studied in 1998 through experiments in field plots with 5 treatments and 3 repeats.The results of variance analyses and stepwise regression analyses were as follows.(1) Using “4 times steady promotive fertilization method”, the assorted applications of triple element,double element and single element fertilizers (15.0kg triple element complex fertilizer, 7.5kg ammonium hydrogen phosphate, 6.0kg urea and other 4.0kg urea per 666.7m 2) at stage of 3.9, 3.0, 1.8 and 0.9 leaf age remainders,respectively, resulted in obvious increases of fruiting primary rachis branche number, total grain number per spike, filled grain number per spike and actual yield per plot,in a certain increase of existing secondary rachis branch number and in a marked decrease of setting rate (but yet as high as 93.9%). (2) Filled grain number per spike correlated closely to total grain number and also correlated closely to fruiting primary rachis branch number and significantly to existing secondary rachis branch number in treatment No.1; the combined regulation of fruiting primary rachis branch number and existing secondary rachis number favored the formation of large spikes and abundant grains; meanwhile filled grain number also correlated closely to fruiting primary rachis branch number and treatments in total sample containing treatments. (3) Total grain number per spike correlated closely to fruiting primary rachis branch number and existing secondary rachis branch number. (4) Existing secondary rachis branch number correlated closely to fruiting rachis branch number and also correlated closely to treatments in total sample containing treatments. (5) Fruiting primary rachis branch number correlated closely to treatments.
出处
《上海农业学报》
CSCD
2000年第2期45-49,共5页
Acta Agriculturae Shanghai
关键词
直播水稻
穗肥运筹
穗部性状
氮
磷
钾
Direct sown rice
Operational research of earing stage fertilizers
Spike characters
