收刈时间对玉米秸秆营养物质产量的影响

【目的】从玉米植株秸秆的总可消化养分产量考虑，确定植株的适宜收刈时间可有效利用秸秆饲料资源，【方法】为此本试验大田试验种植4个早中熟玉米品种，包括农大108、高油298、冀丰58、郑单958，在生长期的92d、96d、100d和104d收刈秸秆，研究收刈时间对秸秆营养物质产量的影响，【结果】试验结果表明，收刈时间明显影响玉米秸秆的有机物、蛋白质、纤维性物质和可消化有机物产量，【结论】所选种的玉米品种秸秆蛋白质和可消化有机物产量在100d达到峰值

The influence of the harvested time on the yield of nutrient substance of corn stalk

OBJECTIVE]Four different maize cultivars, nongdal08, gaoyoull5, jifeng58, zhengdan958, were chosen to study the effects of different harvested time on the yield of nutrient substance of corn stalk. METHOD]The corn stalk were harvested at the growth days of the 92nd ,96th ,100th and 104th, respectively.RESULTS]The results indicated that there were obvious effects on the yield of organ matter, crude protein, fiber substance and digestible organ matter by different harvested time and different maize eultivars.CONCLUSION]The results of trials indicate that the corn stalk could be harvested at the growth days of the 100^th.