人工麻黄种植地杂草消长规律研究

在位于银川市西南部,距银川市直线距离12km,经过人工治理原始风沙荒漠1999年建成的2万亩人工麻黄草种植基地上,以麻黄种植年限为指标,选择4年生麻黄、3年生麻黄和2年生麻黄,在每次人工除草前采用倒置“W”9点取样法进行杂草种类调查;在地势低洼区、高地势区、地势平坦区、土壤粘重区和土壤40cm有钙积层区按五点法布设观测样方,每10d观测一次小区内杂草种类和数量。全年麻黄田共有杂草22种,其中阔叶杂草15种占杂草总量的5.5%,禾本科杂草7种占杂草总量的94.5%。多年生阔叶杂草有4月中旬至5月中旬和5月下旬至7月上旬两个萌发期。一年生阔叶杂草有4月下旬至7月中旬和8月中旬至9月下旬两个萌发期。一年生禾本科杂草有5月中下旬至6月中旬和8月下旬至9月初两个萌发期。

Research on the Growth and Decline Law of Weeds in the Soil of the Artificial Chinese Ephedra

Objective To research on the growth and decline law of weeds for the artificial Chinese Ephedra.Method At the 20,000mu artificial Chinese ephedra planting base that was founded in 1999 to control primitive sand blown by the wind desert, in the southwest of Yinchuan, 12 km away from the city. Using inverted “W” nine point sampling method to investigate weeds kind by choosing Chinese ephedra of 4-year-born,3-year-born and biennial ,respectivly, before hand weeding according to Chinese ephedra service life as index.In low-lying district, high terrain district, terrain smooth district, soil glue serious district and 40cm of soil that has calcium accumulate one layer of district, mading observations according to 5 point method, watching weeds kind and quantity in these districts once every 10 days.Result and Conclusion There are 22 kinds of weeds in the Chinese ephedra field in the whole year, among them 15 kinds broad leaf weeds accounting for 5.5% of the total amount of weeds , 7 kinds grass family weeds accounting for 94.5% of the total amount of weeds . There are two germination periods of the perennial broad leaf weeds that are from mid April to mid May and from the last ten days of May to the first ten days of July . There are two germination periods of the annual broad leaf weeds that are from the last ten days of April to mid July and from mid August to the last ten days of September. Two germination periods of the annual grass family weeds are from the last ten days of April to the last ten days of May and frommid August to the last ten days of September.