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1.崔竹松在密植上的论点是“主蘖并重”。他要求个体多数宜呈“三股叉”状,丛型宜呈“喇叭筒”、“大胡子”状等。实质上,即有计划有目的地控制高产水稻的穗多、穗大等产量性状的形成过程。2.高产田的单株分蘖数的变化,据调查,有80%以上的主茎带有1—3个以上的分蘖穗,其中又以带有两个分蘖穗的较多(平均为1/3左右),表现穗大粒多,个体发育较好。关于每亩总茎数的变化,返青期宜保持15—16万棵,有效分蘖停止期30—32万棵,最高分蘖期控制在50万棵左右,出穗后巩固在38—40万棵左右较好。关于分蘖势方面,返青后10—20天(到有效分蘖停止期)内分蘖数上升最快,有利于促进低节位的分蘖,返青后的20—30天内(到最高分蘖期)分蘖数上升较慢,有利于控制无效分蘖;返青后的30—50天内(到出穗前)分蘖数平缓下降,有利巩固有效分蘖。3.高产田主茎在全田总茎数中所占比率的变化,一般是由高到低再稍为增高的过程,分蘖茎则相反。成熟期比较,从数量上分蘖茎的比率虽可占55—60%左右,但在干重的组成上,基本上主、蘖是各占50%左右。4.高产田的分蘖数变化情况比较适宜时,后期叶面积指数的变化一般为:拔节期3—4,孕穗中期4—5,孕穗末期5—6,出穗齐期5—4,乳熟末期保持3.0左右。5.高产田的分蘖消长变化是否适宜,与肥、密等栽培措施有?
1. Cui Zhusong’s argument on the dense planting is “both tiller and main tiller.” He demanded that most individuals should be presented with a “three-forked” shape, and the clumps should be “horn” and “bearded”. In essence, there is a planned and purposeful control of the yield of panicles, panicles and other yield traits in high-yielding rice. According to the survey, more than 80% of the main stems have more than 1-3 tillering spikes, of which more tillers with two tillers (average 1 / 3 or so), the performance of spike large grain, individual development is better. On the total number of stems per acre change, greening should maintain 15-16 million, the effective tillering period of 30-32 million, the highest tillering stage control in 500000, after the ear consolidation in the 38-40 million better. As for tillering potential, the number of tillers increased fastest 10-20 days after returning to green (to the effective tiller stopping period), which was favorable to the tillering of lower node. The number of tillers increased within 20-30 days after returning to green (to the highest tillering stage) Slower, help to control invalid tillers; turn green after 30-50 days (to the ear before) tiller number decreased gently, which will help consolidate effective tillering. 3. High-yielding field stems in the total number of stems in the total number of changes in the total number of fields, generally from high to low and then slightly increased the process, the tillering stem is the opposite. Compared with the mature stage, the number of tillers and stems can account for about 55-60%, but in the composition of dry weight, basically the main tillers are about 50% each. When the tillering number of high-yielding field is more suitable, the change of leaf area index at the later stage is generally 3-4 at jointing stage, 4-5 at mid booting stage, 5-6 at booting stage, 5-4 at heading stage, To maintain the final 3.0 or so. 5 high yield tiller growth and decline is appropriate, and fertilizer, planting measures such as density?