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随着农村种植业结构的调整 ,大豆的种植面积不断扩大 ,如何提高大豆单产 ,化学除草是关键措施之一。由于大豆前期生长较慢 ,给杂草迅速生长提供了时间和空间 ,同时 ,杂草又为病虫害充当寄主和中间媒介 ,成为大豆产量提高的重要制约因素 ,科学使用化学除草技术不仅省工省时 ,而
With the adjustment of the planting structure in rural areas, the planting area of soybean is expanding continuously. One of the key measures is how to increase soybean yield and chemical weeding. Because of the slow growth of soybean in the early stage, weeds provide the time and space for rapid growth. At the same time, weeds serve as hosts and intermediates for pests and diseases and become an important limiting factor for soybean production. The scientific use of chemical weeding technology not only saves time and labor ,and