摘要
1990～1991年在金坛县尧塘镇下庄村对单季晚粳武育粳2号超高产栽培技术进行了研究。两年实收单产分别为10 237.5kg·ha^(-1)和10 707.0kg·ha^(-1),较大面积单产分别高34.88％和34.19％。该示范方在主要技术环节上实现了4个转变:(1)栽培策略由穗粒并重转变为稳定适宜穗数主攻大穗,使其总颖花量达44 999.55万朵·ha^(-1);(2)由小株方形密植、主茎成穗为主,转变为宽行条栽稀植,以分蘖成穗为主,使成穗率达89.95％;(3)前、中、后期的氮肥施用比例由7.5:1.5:1.0转变为6:1:3,并增施磷、钾肥,N:P_2O_5:K_2O比例为1:0.39:0.46;(4)中期搁田由总茎蘖数超过预期穗数10％左右时一次重搁转变为达预期穗数苗时进行多次轻搁。
Super-high yielding cultural approaches of late-maturity Japonica CV. Wuyuging No.2 were investigated in Xiazhuang village, Yaotang town, Tintan county in 1990～1991, with yields of 10 237.5kg·ha^(-1)-and 10 707.0kg·ha^(-1) respectively. Comparing with the yield of large scale production. They increased 34.88％ and 34.19％ respectively. The major four improvement in management were as fol- lows: (1) The cultural techniques strategically emphased on promoting a large number of spikelets per panicle, instead of aiming on both large panicle and the number of panicles. The total number of spikelets per ha reached as high as 449.9955 million; (2) The composition of density was arranged as a wider row distance with a lower density instead of equal row plant distances, the effective panicles was mainly com- posed of that of tillers instead of main-stem, along with effective tiller percentage increased to 89.95%; (3) The ratio of nitrogen fertilizer top-dressed in earlier, middle and late stages was as that 6:1:3 instead of 7.5:1,5:1.0. respectively. The contents of phosphorous and potassium were increased to 1: 0.39: 0.46 with nitrogen as 1; (4) Irrigation method turned to intermittently stop water supply several times after the population equalled to the expected panicle number, instead of stop water supply once when the popula- tion surpassed 10％ of the expected panicle number.
出处
《江苏农学院学报》
CSCD
1992年第2期31-36,共6页
Jiangsu Agricultural Research
关键词
粳稻
施肥
高产
栽培
水稻
Late-maturity joponica
Super-high yielding cultural
The total number of spikelets per ha
Effective stem-tiller percentage
Formula ferti1izing
