YIELD, QUALITY AND DEVELOPMENT OF FORAGE MAIZE AS INFLUENCED BY DATES OF PLANTING AND HARVESTING
YIELD, QUALITY AND DEVELOPMENT OF FORAGE MAIZE AS INFLUENCED BY DATES OF PLANTING AND HARVESTING
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种植和收获日期对饲用玉米产量、质量和发育的影响
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
N. A. Fairey
中科院分区：
文献类型：
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作者：
N. A. Fairey
通过3年的试验研究了播期和收获期对饲用玉米产量、品质和生长发育的影响。研究的处理是五个种植日期的所有可能的组合，从4月下旬到6月中旬，间隔2周，和三个收获日期（9月中旬，10月上旬和中旬）。5月初至6月中旬，播种每延迟1天，平均导致全株可消化干物质产量减少1%。体外干物质消化率没有显着影响收获日期，但逐渐减少从66%至63%的种植日期推迟。虽然谷物含量变化从0到50%的全株干物质，它有很小的影响，在体外消化率的饲料玉米，只有从62%到68%，当全株干物质含量是可以接受的直接青贮。在灌浆期（吐丝中期后450-1600热单位），全株干物质含量（%）与籽粒产量呈线性关系。
The effects of dates of planting and harvesting on yield, quality and development of forage maize were investigated in a 3-yr study. Treatments studied were all possible combinations of five planting dates, spaced at 2-weekly intervals from late April to mid-June, and three harvest dates (mid-September, early and mid-October). Between early May and mid-June, each 1-day delay in seeding resulted, on average, in a 1% reduction in whole-plant digestible dry matter yield. In vitro dry matter digestibility was not significantly affected by date of harvesting but was reduced progressively from 66 to 63% as the date of planting was delayed. Although grain content varied from 0 to 50% of whole-plant dry matter, it had little effect on the in vitro digestibility of forage maize, which only ranged from 62 to 68%, when whole-plant dry matter contents were acceptable for direct ensiling. During the grain-filling period (450–1600 corn heat units after mid-silking), whole-plant dry matter content (%) was linearly relat...