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紫花苜蓿种子田播种量和行距对种子产量影响很大。我们在准噶尔盆地北部,海拨481米的平原灌溉区,进行了密度试验。 一、试验地概念与试验方法 (一)土壤条件:棕钙土含砂砾石多。40厘米土层有机质含量0.4％,全氮0.03％、全磷0.053％、钾1.5％以上。PH8.09～8.14。翻耕前每公顷施羊粪30000公斤。 (二)耕作处理:4月中旬深耕20厘米左右,用缺口耙耙平土块,并用钉齿耙除去杂草根茬。用机引播种机播种,播后用镇压器镇
Seeding rate and spacing of alfalfa seed field have a great impact on seed yield. We conducted a density test in a plain irrigation area 481 meters above sea level in the northern part of Junggar Basin. First, the concept of experimental sites and test methods (A) soil conditions: brown clay sandy gravel and more. 40 cm soil organic matter content of 0.4%, 0.03% of total nitrogen, 0.053% of total phosphorus, potassium 1.5% or more. PH8.09 ~ 8.14. Thousands of hectares of sheep manure were applied before plowing. (B) tillage processing: in mid-April deep plowing 20 cm, with rake rake flat soil block, and use razor to remove weeds stubble. Sowing seeds seeded with machine, broadcast after the town with a press