摘要
1986年晚季选取秧田播种量,本田基本苗数和 N,P,K 施用量5个因子,采用旋转回归设计在莆田埭里等农科站对汕优63进行试验.结果表明:(1)总粒数对产量的直接通径系数和净作用系数最大,而总粒数是通过主攻有效穗来实现的.(2)产量高于7.5t/ha 的栽培技术方案是每公顷稻田播种量240～265kg,本田基本苗数96.06～99.96×10~4;闽中南土壤肥力较高的稻田,每公顷施用 N,P,K 分别为131.25～141.75,54.75～57.00和84.00～92.25kg;中等肥力为159.45～164.25,72.60～88.05和108.45～121.05kg.1987年在莆田进行可行性论证,产量为6.87～7.74t/ha.
A five factor experiment with five levels was conducted at the Dill Experimental Station,Putian,Fujian in 1986 in light of the design of orthogonal-gyrating-regression combination.Hybrid rice Shanyou 63 was used for a test material.The data were analysed by FO-3 computer,then several linear regression and nonlinear regression equations were established. According to the mathematical models,interactions between agronomic characteristics were described in detail.The results were as follows:(1) Analyses of path correlation showed that no.of total spikelets per ha.had the greatest effect on grain yield.No.of effective panicles was closely correlated with no.of total spikelets per ha.So,it is the key to increasing no.of effective panicles with optimum spikelets in hybrid rice Shanyou63. (2)Treatments with 240-265.5 kg sowing norm,96.05-99.96×10~4 seed- lings,131.25-141.75 kg N,54.75-57.00 kg P_2O_5,and 84-92.25 kg K_2O per ha.in paddy soil with higher level fertility or 159.45-164.25 kg N,72.60- 88.05 kg P_2O_5,and 108.45-121.06 kg K_2O per ha in paddy soil with medi- um level fertility would expected to gain a high yield and the best econo- mic effectiveness.The conclusions were satisficatorily verified at Putian, Fujian in 1987.
关键词
水稻
杂交水稻
栽培
高产
数学模型
hybrid rice
Shanyou 63
high yielding cultivation technology
mathematical model
orthogonal-gyrating-regression design
