苏丹草杂交高粱最佳施氮量及分施氮肥的确定

Safa B. A. AL-Aboudy
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摘要

本研究于秋季/ 2020年在Basra大学农业学院农场- karat Ali地点进行,研究氮肥水平(0、150、200和250 kg N ha-1)和三次分施氮肥的影响:(播两周后为1 / 4,第一次刈割后为+ 1 / 2 +第二次刈割后为1 / 4,播两周后为1 / 2 +第一次刈割后为+ 1 / 4 +第二次刈割后为+ 1 / 4,播两周后为1 / 3,第一次刈割后为+ 1 / 3 +第二次刈割后为+ 1 / 3)分别用D1、D2、D3表示。试验采用R.C.B.D设计,分小区3个重复,主小区施氮,分小区施氮。结果表明,200 kg N hm -1水平较好,3个刈割的大部分生长参数均最高,青草产量最高,分别为66.196、82.407和20,533 μg hm -1。分施氮肥(D2)的株高、枝数、叶数最高,一、二采青草产量最高,分别为57.382和71855 μg ha-1。200 kg N ha-1与D2的互作在第一次刈割时绿草产量最高,为72.333 μ ha-1, 200 kg N ha-1与D1的互作在第二次刈割时平均绿草产量最高,为84.853 μ ha-1
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Identification of Best Rate and Split Application of Nitrogen Fertilizer for Sudangrass Hybrid (Sorghum Vulgare Var. Sudanense)
The study was conducted in Agriculture College farm / Basra University – Karmat Ali location, during autumnal season / 2020, to study the effects of Nitrogen fertilizer levels (0, 150, 200 and 250 kg N ha-1), and three split application of nitrogen fertilizer which is: (¼ after two weeks of sowing, + ½ after the first cut + ¼ after the second cut , ½ after two weeks of sowing + ¼ after the first cut + ¼ after the second cut, ⅓ after two weeks of sowing, + ⅓ after the first cut + ⅓ after the second cut) symbolized by D1, D2, and D3 respectively, on growth and green forage of the hybrid of Sudan grass. The experiment was split-plots in R.C.B.D design with three replicates, the main plots included the nitrogen fertilizer, while split application were placed in the sub plots. . The results showed that the level 200 kg N ha-1 was superior and gave the highest in most of the growth parameters, as well as the highest green forage yield of 66.196, 82.407 and 20,533 μg ha-1, for the three cuts respectively.The split application of nitrogen fertilizer (D2) achieved the highest plant height, number of branches, number of leaves, also D2 achieved the highest green forage yield in the first and second cuts were 57.382 and 71,855 μg ha-1. The interaction of 200 kg N ha-1 with D2 gave the highest green forage yield at the first cutting of 72.333 μg ha-1, while, at the second cutting the level of 200 kg N ha-1 with D1 was gave the highest average green forage yield of 84.853 μg ha-1
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