【作者】 林涛；

【导师】 石书兵； 张巨松；

【作者基本信息】 新疆农业大学 ， 作物栽培与耕作学， 2007， 硕士

【摘要】 采用三因素三水平正交试验设计,应用模糊数学综合评价方法,探讨了海岛棉高产群体特征,揭示了密度、氮肥用量、打顶时期对产量和纤维品质的影响机理,提出了新疆海岛棉高产优质栽培技术方案。主要结论如下:1.皮棉产量在0.15×10~4kg/hm~2以上的高产群体生长发育较快,植株干物质及生殖器官干物质积累速率较高,Vmax分别出现在出苗后87～91d,和89～95d,积累量为11980～15721 kg/hm~2,和6335～7149kg/hm~2,经济器官重占总干重的45.47～52.87%。2.高产群体果枝数为91.74～124.57个/m~2;铃数为59.98～77.44个/m~2;生殖器官重为0.0116～0.0135 kg/m~2。3.求得产量与栽培因子的回归方程,确定了产量及产量构成因子受调控措施的影响状况,得出:密度0.3×10~6株/hm~2,施用尿素0.585×10~3kg/hm~2,7月23日打顶可以获得最佳理论产量0.2415×10~4kg/ hm~2。4.计算了纤维品质性状因子的权重系数,建立隶属度函数,求得模糊综合评价值与栽培因子的回归方程,确定了品质性状受调控措施的影响状况,并得出密度0.1632×106株/hm~2,尿素用量0.126×10~4kg/hm~2,7月25日打顶,可以获得纤维品质最佳理论评价值Ymax=1.6117。5.密度与纤维长度、强力、伸长率、可纺系数、成负效应,与马克隆值、成正效应;氮肥用量与强力、马克隆值、成负效应,与长度、伸长率、可纺系数、成正效应;打顶时期与长度、强力、马克隆值、伸长率、可纺系数均成正效应;6.采用密度0.21×10~6株/hm~2,尿素0.525×10~3kg/hm~2,7月25日打顶的栽培试验设计较易获得产量与纤维品质的最佳组合。更多还原

【Abstract】 Adoption three quarters×three levels orthogonal design and using fuzzy mathematics evaluation.Study on Population Quality Characters and density ,nitrogenous fertilizer, tip pruning times on sea island cotton yield and fiber quality.for high yied of Sea Island Cotton.Expound cultivated of high yield and eximious fiber quality for Sea Island Cotton in Xin Jiang. The main results were as follows:1. It is faster-grown for high yield level colony. Dry substance of plant and procreant apparatus were accumulated faster. The maximal speed was presented to postemergence 87～91d and 89～95d , the amount of accumulation was arrived 11980～15721 kg/hm~2 and 6335～7149kg/hm~2, in proportion with plant weight rate of procreant apparatus is 45.47～52.87%.2. The amount of fruit branch, boll and weighe of procreant apparatus is 91.74～124.57branchs/m~2, 59.98～77.44 bolls/m~2, 0.0116～0.0135 kg/m~2.3. The regression model between cultation factors and yield was established. The cultation factors restricted degree of cultivation measure was confirmed. The result that highest yield y=0.2415×10~4kg/ hm~2 can be obtained is density at 0.3×10~6plants/hm~2 , dressing carbamide 0.585×10~3kg/hm~2, tip pruning July 23th.4. The measure of fiber quality factors and subject equations were established. Using fuzzy mathematics evaluation obtain the regression model between cultation factors and fiber quality. The fiber quality factors restricted degree of cultivation measure was confirmed. The result that highest fiber quality y=1.6117 can be obtained is density at 0.1632×10~6plants/hm~2 , dressing carbamide 0.126×10~4kg/hm~2, tip pruning July 25th.5. Density is present negative correlate between fiber length lot limite, strength, elongation, SCI and present positive correlate between micronaire. Dressing carbamide amount is present negative correlate between fiber strength, micronaire and present positive correlate between fiber length lot limite, elongation, SCI. Tip pruning times is present positive correlate between fiber length lot limite, strength, micronaire, elongation and SCI.6. Yield and fiber quality optimal combination can be obtained is is density at 0.21×10~6 plants/hm~2 , dressing carbamide 0.525×10~3kg/hm~2, tip pruning July 25th.更多还原