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首页> 外文会议>Regional Wheat Workshop for Eastern, Central and Southern Africa >THE EFFECT OF CROPPING SEQUENCE AND FERTILIZER LEVEL ON YIELD, YIELD COMPONENTS AND NITROGEN UPTAKE OF BREAD WHEAT IN SOUTHEASTERN ETHIOPIA
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THE EFFECT OF CROPPING SEQUENCE AND FERTILIZER LEVEL ON YIELD, YIELD COMPONENTS AND NITROGEN UPTAKE OF BREAD WHEAT IN SOUTHEASTERN ETHIOPIA

机译：作物序列和肥料水平对埃塞俄比亚东南部面包小麦产量，产量组分及氮气吸收的影响

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摘要

The influence of cropping sequence and fertilizer N and P on yield, yield components and N uptake of bread wheat (Triticum aestivum L.) was determined in crop rotation trials conducted from 1992-94 at two locations representative of the wheat growingareas of southeastern Ethiopia. Nine cropping sequences were considered in which monoculture wheat was compared with 3 sequences consisting of wheat 1 year out of 2, and 5 sequences with wheat grown 2 years out of 3. Each phase of the crop rotations waspresent each year. The break crops were faba bean (Vicia faba), rapeseed (Brassica napus L.) and barley (Hordeum vulgare L.). Factorial combinations of two rates of nitrogen (0 and 41 kg N/ha) and two rates of phosphorus (0 and 20 kg P/ha) were includedas subfactors. Crop rotation and fertilizer had significant effects on the grain yield of wheat at both locations in the 1994 (third) season. Yield was highly affected by the incorporation of dicot crops in the rotation, by the use of a 2 year vs. a 3 year rotation, and by the use of leguminous faba bean vs. rapeseed. Yield components such as 1000 kernel weight, spikes/m~2 and grains/m~2 were significantly affected by cropping sequence while N showed more effect than P on most yield components. Significant interactions between N and P response and crop rotation were observed. The effect of cropping sequence and fertilizer on the N uptake of wheat was significant at both locations. Dicot rotations resulted in a greater N uptake by wheat relative to continuous cereal rotations. First year wheat after any break crop exhibited a significantly higher N uptake relative to second year wheat.
机译：作物旋转试验中，在1992-94次代表东南埃塞俄比亚小麦种植酶的两个地点，测定了种植序列和肥料N和P对面包小麦（Triticum Aestivum L.）的影响，产量组分和N的影响。考虑了九种种植序列，其中将单种质小麦与3个序列进行比较，其中2个序列由2个，5个序列，其中5个序列，小麦生长2年。每年的作物旋转的每一阶段都有。休息作物是豆豆（Vicia Faba），油菜籽（Brassica Napus L.）和大麦（Hordeum Vulgare L）。包括两个氮气（0和41 kg n / ha）的阶乘组合和两个磷（0和20kg p / ha）的余量。作物旋转和肥料对1994（第三个）季节的两个地区的小麦籽粒产量有显着影响。通过使用2年与3年的旋转，通过使用2年的旋转，并通过使用豆类豆豆与油菜籽的使用掺入了旋转中的旋转作物的产量受到高度影响。产量组分如1000个核重量，尖刺/ m〜2和晶粒/ m〜2受到种植序列的显着影响，而n在大多数产量组分上显示比p更多。观察到N和P响应和作物旋转之间的显着相互作用。在两个位置，种植序列和肥料对小麦N的效果显着。 Dicot旋转导致小麦相对于连续谷物旋转产生更大的N个吸收。在任何突破作物后，小麦的小麦相对于第二年小麦的高度吸收。

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