论文部分内容阅读
剑麻刈叶费工甚大,投产后刈叶所花的工就占农业用工总数的四分之一,加上叶尖有锐刺,工人刈叶时(?)被刺伤,亟需用机械刈叶来代替.但由于“中心难找”、“刈叶、(?)叶很难掌握”,刈叶机的设计非常困难.看来得走“整株一次收获”这条路了.可是有人顾虑实行“整株一次收获”法,收下来的心叶和顶部叶尚未成熟,纤维的产量和质量都会降低.持这种观点的人是受一种迄今还流行着的错误观念所影响.这种错误观点以为剑麻叶离中轴展开后须展到45度角才届成熟,小于45度的心叶和顶部叶未成熟,纤维少,拉力差,因此刈叶时只能刈45度角以下的叶片.实际情况并非如此.从结构上看,叶片一旦离开中轴就已成熟.早在叶片还处于心叶期时,叶纤维的发育就基本完成了.纤维的长度、
Sisal mowing leaves are very laborious, and the labor costs for the mowing of the mowing leaves account for one quarter of the total number of agricultural hires. When the mow leaves are spiked (sharply punctured) But because of “the center is hard to find”, “the leaves are difficult to grasp,” the design of the leaf-cutting machine is very difficult and it seems that the whole plant will be harvested once. However, some people Concerns about the “whole plant harvest” approach, the harvesting of the heartbeat and the top leaves, are still immature, and the production and quality of the fibers diminish. Persons who hold this view are influenced by a misconception that so far prevails. The wrong view that the sisal leaves from the axis to be developed to 45 degree angle before maturity, less than 45 degrees of the heart and the top leaves immature, less fiber, pull poor, so mowed only 45 degrees angle The following leaves. The actual situation is not so .From the structural point of view, once the leaves have been mature from the axis.As early as leaves still in the leaf stage, the development of leaf fiber is basically completed.Fiber length,