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1996年醴陵基点双季稻超高产栽培技术途径比较试验结果表明,采用高效化控栽培法处理,前期生长稳健、个体发育好,中期群体适中、稻穗发育好,最大叶面积指数约7.5,光合产物积累多,孕穗期占成熟期的50%~55%,群体内部透光率高。后期功能叶光合能力强,光合产物运转率高,籽粒充实度好,经济系数高。早晚稻产量分别达到8101.5kg/hm2和8731.5kg/hm2,早晚稻子物质积累和养分吸收表现出明显的差异。早稻分蘖期气温偏低,干物质生产量小(为成熟期的13.3%),养分吸收总量少,抽穗后光合产物生产量大,高产潜力大。晚稻分蘖期气温高,干物质生产量大(为成熟期的18.8%),养分吸收总量多,抽穗后期光合能力弱,但晚稻灌浆结实的时间长,对高产形成有利。
In 1996, Lilingji double-cropping rice high-yielding cultivation techniques and ways of comparison test results show that the use of highly efficient controlled cultivation method, the early growth and stability, good individual development, mid-term population is moderate, good panicle development, the maximum leaf area index of about 7.5 , Photosynthate accumulation, booting period accounted for 50% to 55% of maturity, the group of high light transmittance. Late functional leaf photosynthetic ability, photosynthetic products operating rate, grain fullness, economic coefficient high. The yield of morning and evening rice reached 8101.5kg / hm2 and 8731.5kg / hm2, respectively. The contents of material accumulation and nutrient uptake of morning and evening rice showed obvious differences. Low temperature at early tillering stage, low dry matter production (13.3% of mature stage), less total nutrient uptake, large photosynthetic production after heading, and high yield potential. High temperature at late tillering stage, high yield of dry matter (18.8% of mature stage), total amount of nutrient uptake and photosynthetic ability at late heading stage were weak, but late rice had a long time of filling and fruiting, which was beneficial to high yield.