稻田长期连种粮食三熟制“大麦双季稻”的高额稳产性和施肥效应

High yield stability and fertilizer efficiency under the successive planting of a triple cereal cropping (barley double-cropped doube-cropped rice rice) in paddy fields:

在中国浙江省东南部滨海平原上的黄岩市,通过历时18年(1974～1991)的长期定位试验,得出稻田连年种植粮食三熟制“大麦双季稻”的研究结果为:尽管受到不同年份气候的影响以及同一复种方式长期连种带来的局限因素,但在固定的施肥管理条件下加上不断更换高产抗病良种,18年平均亩产可以保持吨粮水平(1009kg/亩)。说明在一定的生产条件下,粮食三熟制可以长期连种而达到高额稳产。研究还阐明了有机肥和化肥不同配比组合下的最佳增产效应。

A Iong term (1974-1991) experiment of successive planting the triple cereal cropping (barley double-cropped rice) has been conducted at Huangyan City, near the east south coastal plain of Zhejiang province. The results indicated that though the different climate conditions and some successive planting disturbance have affected the experiment, yet with the adaption of good crop varieties and keeping a definite level of fertilization and field management, the average annual grain yield of the triple cereal cropping reached a level of 1009kg/mu. It is evidenced that under an intensive practical condition, the triple cereal cropping could be planted succssively and obtain a moderate high yield. The best N efficiency from different proportion of both organic manure and chemical fertilizer was mentioned also.