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材料与方法 试验在国际半干旱所的淋溶土壤上进行,前茬玉米,1982年2月12日播种,重复6次。无根瘤花生施用100公斤N/公顷化肥处理作对照A,排列在区组中心,其他处理在其四周排列。固氮处理的供试品种是:不接种根瘤菌的J-11,Gangapuri(西班牙型),PI-259747(瓦棱西亚型),NC-17,ICGS-22和Robut33-1(弗吉尼亚型);接种根瘤菌菌株NC-92的Robut33-1。各处理均施用10公斤N/公顷化肥。无根瘤花生施用200公斤N/公顷化肥,作对照B,以便检查氮肥用量增加是否影响评价土壤有效N的结果。行距75厘米,株距10厘米,每小区6行,长6米,面积27米~2。
Materials and Methods The experiments were carried out on the leached soil of the International Semi-arid Institute. Maize crop, sown on February 12, 1982, was repeated 6 times. Root nodule peanut application of 100 kg N / ha fertilizer treatment control A, arranged in the block center, other treatments arranged in its surroundings. The nitrogen-fixing test varieties were: J-11, Gangapuri (Spanish type), PI-259747 (Vaccinosia type), NC- 17, ICGS- 22 and Robut 33-1 (virgin type) Robut 33-1 of Rhizobium strain NC-92. Each treatment applied 10 kg N / ha of fertilizer. Root nodule peanut fertilizer 200 kg N / ha was used as control B in order to check whether the increase of nitrogen fertilizer dosage would affect the result of soil available N evaluation. Row spacing of 75 cm, spacing 10 cm, 6 rows per cell, 6 meters long, an area of 27 meters ~ 2.