With delaying of sowing date, seeding and growth periods were shorter, but different in hybrids.
播期对穗部性状秃顶长的影响最大，其次是穗长和行粒数。
There were significant differences in the effect of genotype and seeding date on the numbers of survived primary branches, degenerated primary branches, survived spikelets, differentiated primary branches, and survived secondary branches among the genotypes, and the difference of the five indexes was only related to the given genotype, irrespective of whether it belonged to the hybrid, conventional variety, and male sterile line or not. The SPB, SS, SSB, PBD showed high effect of genotype and low effect of seeding date whereas DPB displayed high effect of seeding date. The number of survived spikelets per panicle (namely total grain number per panicle) was highly postively related to SPB, SSB, and PBD hot lowly to DPB, which was affected by SPE through the formation of SSB.
结果表明：1各基因型间现存一次枝梗数、一次枝梗退化数、现存颖花数、一次枝梗分化数、现存二次枝梗数的基因型值和播期效应值差异均显著，且5个指标的差异仅与特定的基因型有关，而与其是否属于杂交组合、常规品种和雄性不育系等类型无关。2现存一次枝梗数、现存二次枝梗数、现存颖花数、一次枝梗分化数4个指标的基因型值较大，播期效应值较小；一次枝梗退化数播期效应值较大。3单穗颖花现存数与现存一次枝梗数、一次枝梗分化数、现存二次枝梗数呈密切正相关，与一次枝梗退化数相关性小，现存一次枝梗数主要通过改变现存二次枝梗数来影响单穗颖花现存数。
The seeding date is earlier, and more dry matter has been accumulated and higher indicators of economic characters.
播期越早，吸收的营养物质越多，根、茎枝、叶、角果等干物质累积越多，株高、主花序角果数、单株角果数、茎粗、每果粒数、产量越高。
Except the review meetings held in this company, seven major elements of costs of prevention and appraisal include training of the engineering clerk and site engi- neer for the site ``information collection of site condition by telephone`` which was introduced in December 2002; introduction of the new and advanced hydro-seeding machine in February 2002; upgrading computer sys- tems and introducing an internal e-mail system; using a digital camera system to record all the work and site con- ditions during the site operation and investigation by the engineers; consulting and meeting with professionals by joining seminars and conferences, which can provide up-to-date information on hydro-seeding activities; providing related books and magazines in the library for improving the knowledge of employees; employing one part-time engineer to help and to improve the perfor- mance quality; inspection of hydro-seeding work within 100 days; undertaking digital photos by engi- neers during inspection in monitoring thegrowth condition of grass and site conditions; and carrying out ISO 9001 audition every six months, which includes checking, inspecting, filing, recording all reference information in a required format.
除审查会议举行的这家公司，七大要素成本的预防和评价包括：培训工程秘书和网站工程师- neer该网站的''资料收集的立地条件通过电话''其中介绍了在2002年12月；引进新的和先进的水力发电播种机在2002年2月；提升电脑系统 tems和引进一内部电子邮件系统；使用数码相机系统，以记录所有的工作和网站协商 ditions期间，该网站的运作和调查所工程师；咨询和会议与专业人士参加研讨会和会议，可提供不断更新的资料，水电直播活动；提供相关的书籍和杂志，在图书馆为提高知识的雇员；聘用 1部分时间制的工程师，以帮助和改善性能 mance质量；检查水电播种工作 100天内；承诺，数码照片由工程师- neers ，检查过程中，在监测的情况thegrowth 基层和立地条件；和进行的ISO 9001品质音，每6个月，其中包括检查，检查，归档，记录所有的参考信息，在一所需的格式。
Under the conditions of the different sowing date and transplanting density in the WanDao 68 growing period and yield changes, results that the growth period of WanDao 68 is reduced with the delayed sowing time, but deferred to the June 14 seeding still may be normal ripe; transplanting density on the growth period had no significant effect.
黄雅丽，黄义德摘要：研究不同播期和移栽密度试条件下皖稻68的生育期和产量形成的变化情况，结果表明，皖稻68生育期天数随播期的推迟而递减，但推迟到6月14日播种仍可正常成熟；移栽密度对生育期无明显影响。
Aiming at recent decade drought stress on Spring maize production in Nanzheng, a comparison of the precipitation distribution between 1966-2000 and recent decade are made, and it is put forward that ensure of seeding temperature the start seeding date is ten days ahead can adapt precipitation distribution better and the harm of drought is reduced.
针对近10年干旱对南郑春玉米生产的威胁，分析了历年和近10年春玉米生育期内降水分布规律，提出了在保证出苗温度的前提下将春玉米播种期提早一旬，能更好地适应近年降水分布规律，减轻干旱危害。
Study on changes of Chinese Date test-tube seeding of photosynthetic characteristic after removed from cultivation
红枣试管苗炼苗过程中光合特性的变化研究
Relationship of Yield, with Fertilizing Rate, Seeding Amount and Planting Date of Winter Wheat after Northing
冬麦北移种植产量与施肥量、播种量和播种期关系的研究
Characteristics on response to day length and temperature of winter soybeans and their appropriate date of seeding
冬大豆的光温特性及最佳播种期
Spatial Distribution of Beginning Date of 10 ℃ and Latest Frost and Their Impacts on the Cotton's Seeding Time in Xinjiang
新疆棉区10℃初日和终霜期的空间分布特征及其对棉花播种期的影响
Effects of Different Seeding-date on Yield and Related Characteristics of Summer Maize Effect of intercropping summer and spring maize on photosynthesis and yield of summer maize
夏玉米播期对产量及相关性状的影响不同品种春夏玉米套作模式中夏玉米光合特性与产量的关系
Sowing date had great effects on growth stage and utilization of temperature and illumination of direct seeding rice.
播期对直播稻生育期及温光的利用有较大的影响。
Effects of Different Varieties and Sowing-date on Growth ang Yield of Direct-seeding Late Rice
不同品种与播期对直播晚稻生长发育及产量影响研究
By studying the performance of rice false smut in 4 key stages: seedling, tillering, booting and full heading, the result come that the treatment in booting stage can prevent this disease most effectively in every seeding date, exceeding 90%.
在水稻苗期、分蘖期、孕穗期和齐穗期分别对稻曲病进行药剂防治处理，结果表明，孕穗期处理对不同播期均最有效，防效均超过90%。
Responses of yield and yield components to seeding date treatments for different cultivars varies due to the different growth period and subsequent different environmental factors for different cultivars. (3) High temperature in panicle initiation period affected rice yield tremendously and negatively.
不同品种的产量及构成因子播期间的差异有所不同，这与品种的生育期及对各种生态因子的适应性有关。（3）幼穗分化期日温和夜温的升高显著降低了水稻产量。
Second, the extension in irrigation regions could play a water-saving and water conservational rule, but the suitable date of seeding should be delayed 7-10d.
灌区推广可起到节水保水作用，但适宜播期应相应后移7～10d；
Effect of seeding Date, Thickness of Sowing and Heeling-in Seedling age on the yield of Pepper
播种期、用种量及假植苗龄对辣椒产量的影响
Effects of Genotype and Seeding-Date on Formation of Branches and Spikelets in Rice Panicle
稻穗枝梗和颖花形成的基因型及播期效应分析
The Influence of Parents, Mating Systems and Seeding Date on the Transfer of Gynoecious Flowering to Cucumbers
亲本类型、杂交方式和播种日期对黄瓜雌性系转育的影响
By studying the performance of rice false smut in 4 key stages: seedling, tillering, booting and full heading, the result come that the treatment in booting stage can prevent this disease most effectively in every seeding date, exceeding 90 %.
在水稻苗期、分蘖期、孕穗期和齐穗期分别对稻曲病进行药剂防治处理，结果表明，孕穗期处理对不同播期均最有效，防效均超过90%。