| 小麦熟相的氮肥效应与光合成特点 |
| |
| 引用本文： | 位东斌.小麦熟相的氮肥效应与光合成特点[J].北京农学院学报,1988(2). |
| |
| 作者姓名： | 位东斌 |
| |
| 作者单位： | 莱阳农学院 |
| |
| 摘 要： | 氮肥的不同用期和不同的用量研究表明,小麦成熟时的表现可分为早衰、正常和贪青三种熟相。药隔期前亩施氮肥(硫酸铵,下同)超过70公斤,表现前期群体过旺,后期容易倒伏,形成贪青熟相,其光合成特点为糖氮比值低,灌浆强度低,千粒重日增量小,成熟不正常,产量下降;自药隔期开始施氮肥,即使超过100公斤/亩,也未出现贪青和倒伏,表现正常落黄熟相,灌浆强度高,千粒重日增量大,产量高;始终不施氮肥的处理,特别是在土壤肥力差的情况下,均表现群体小,生长量不足,灌浆结束早,后期早衰,产量低。在高产麦田采用依靠土壤基础肥力保穗数,药隔期重施肥水促穗重的施肥体系,利于小麦正常落黄,穗足穗重、高产不倒。
|
| 关 键 词： | 冬小麦 施肥期 施肥量 熟相 |
STUDIES ON THE EFFECT OF NITROGEN FERTILIZER UPON THE RIPENING APPEARANCE AND PHOTOSYNTHESIS CHARACCTERISTICS OF WINTER WHEAT |
| |
| Wei Dongbin.STUDIES ON THE EFFECT OF NITROGEN FERTILIZER UPON THE RIPENING APPEARANCE AND PHOTOSYNTHESIS CHARACCTERISTICS OF WINTER WHEAT[J].Journal of Beijing Agricultural College,1988(2). |
| |
| Authors: | Wei Dongbin |
| |
| Institution: | LaiYang Agricultural College |
| |
| Abstract: | The studies showed that the winter wheat appearances at ripening stage under different amounts of fertilizer and application at different growthstages revealed three cases-early senesent,normal and late ripening.When the nitrogen fertilizer(ammonium sulphate)applied more than 70kg per mu before the jointing stage, the population was over-luxuriantat ealier growth period and easily falling over at later period, the wheatwas still green at normal harvesting stage and appeared to be late ripen-ing, its photosynthesis characteristics were that the G/N and the rate ofgrains being in the milk were lower, the increasing weight of 1000-grainsper day descended, the yield decreased. After the joiting stage, all treat-ments of nitrogen fertilizer application ripend normally and the rate ofgrains being in the milk and the increasing weight of 1000-grains per daywere higher, the yield increased, even the amount of nitrogen fertilizerapplied was over 100 kg per mu. Of the treatment without nitrogen ferti-lizer applied was over 100 kg per mu. Of the trcatment without nitrogenfertilizer application, the population was small and appeared to be early senescent, the grains being in the milk stopped early and the yield was lower.From the exeriment we concluded that in high-yield winter wheat fieldthe soil fertilizer should be used to insure a certain amount of ears. Toincrease the ear weight, the jionting stage is an important stage of nitro-gen fertilizer application.The method of nitrogen fertilizer application cangain enough ears, high ears weight and high yield without falling over. |
| |
| Keywords: | winter wheat stage of fertilizer application amount of fertilizer applied ripening appearance |
| 本文献已被 CNKI 等数据库收录！ |
|
