摘要
安徽中南部热量资源“双季稻不足,一季稻有余”地区有稻田近100万亩可发展再生稻。50年代前有蓄留再生稻的长期历史,但一般靠天收,亩产仅几十公斤,推广双季稻后向乎绝迹。近年由于育成一批适于此区再生栽培的品种(组合),改进了栽培技术,再生两熟总产可接近双季稻,显著节省工本,深受农民欢迎,迅速发展了几万亩。然而也有因用种或栽培技术不当使再生稻大面积失收的。再生稻能高产难稳产。它由头季稻茎节潜伏芽培育成穗,头季若生育不良不仅当季欠收,再生稻也显著减产。再生稻在头季抽穗前已开始穗分化,其营养生长完全与生殖生长并进,生育期比双晚约短1倍。为适应我省中南部发展水稻生产的迫切需要,在安徽省科委支持下,我们研究了早中稻再生两熟高产高效栽培数学模式。
The culture experiments for the renascent-double-ripe rice were conducted with mid-early hybrid rice 'Xieyou No. 64' by the design of rotation-regression-orthogonal combination in Hefei, Tongcheng, Dangtu, and Guangde during the years of 1987 and 1988, which were composed of five factors such as seed rate, seeding age, transplanting density, the manuring of nitrogen and phosphorous and five levels per one. The data gained by statistical analysis indicate that compound correlations between the test factors and the paddy yield per mu and the growth stage or the growth development character are relatively remarkable. The quinary quadratic regression equations were respectively gained. The 695 plans for the culture measures of renascent-doubleripe rice over 600 kg/mu were sieved through the optimal analysis of the yield regression equations. The confidence interval of over 95％ are seeding age of 33-34days, seed rate of 19-20 kg/mu, transplanting density of 34-36 thousand main stem/mu, N of 13-14 kg/mu, P_2O_5 of 10-11 kg/mu. From the frequency analysis, the plan of the high yield and best effect was also gained with the double-ripe paddy yield of 700 kg/mu.
出处
《安徽农业科学》
CAS
1989年第3期21-31,共11页
Journal of Anhui Agricultural Sciences
