摘要
1989～1991年采用均匀设计和计算机处理技术。研究了氮肥与化控配合应用对棉花产量、品质性状的影响,建立了以皮棉产量、纯利润、霜前花率、僵瓣率和纤维长度等为目标性状的二元二次函数模型。解析结果表明:氮肥是影响棉花产量和品质的主要因素,其增减对产量和品质的影响较大,适量施氮产量、效益高;随着氮肥用量的增加,霜前花比例下降,僵瓣率提高。适当化控有改进品质、提高产量、增加效益的作用。氮肥与化控之间存在协同效应,表明增施氮肥同时适当化控有利于产量、品质和效益的提高。在本棉区中等偏上肥力水平的条件下,每公顷产皮棉1200～1425kg、纯利润8100～9600元的优化方案是:纯氮112.5～150.0kg/hm^2,化控缩节安量为30～72g/hm^2。
This study was carried out to determine the effects of nitrogen fertilizer and chemical control—1, 1-dimethylpiperidinium chloride (DPC) on lint yield and fiber quality of cotton during 1989～1991. Even design and computer processing technique were used to establish the function models of lint yield, net profit, pre-frost lint percentage and dead locule percentage. Results indicated that nitrogen fertilizer was a major factor influencing yield, qua lity and economic profit of cotton compared to chemical control, increasing of reducing N rate would result in greater changes of lint yield and fiber quality. The highest lint yield or net profit could be obtained N at 147 and 117kg/hm^3. Prefrost havested lint percentage decreased and dead locule percentage increased with the increasing of N rates. The fiber length was increased slightly N from 0～262.5kg/hm^3. Proper using chemical control could improve fiber quality, lint yield and economic profit. The positive interaction between nitrogen and chemical control for lint yield and net profit showed that increasing N rates in combination with chemical control was beneficial to enhancing lint yield and net profit, but marginal response analysis noted that exessive use of N rate would lead to greater reduction of lint yield and profit compared to that of DPC. Optimum rates of N and DPC for lint yield of 1200～1425kg or net profit of 8100～9600 yuan/hm^2 was recommended N at 112.5～150.0kg, DPC 30～72g/hm^2 respectively in this area.
出处
《棉花学报》
CSCD
北大核心
1993年第2期49-54,共6页
Cotton Science
关键词
棉花
均匀设计
氮肥
产量
品质
nitrogen fertilizer, chemical control, lint yield, fiber quality, cotton, even design
