摘要
Phalaris arundinacea L. is fine perennial herbage of Gramineae. Eight treatments including N, P, K, NP, NK, NPK, PK and controls were done for studying its absorbing efficiency of soil nutrition. At tillering stage, the coefficient of absorbing and utilizing of N, P, and K from soil and fertilizer were analyzed according to M.K. Kaeomobk抯 formula and the contents of crude protein and fat were also measured. The yields of fresh crop, hay and seed were measured at ripening stage. For N absorbing coefficient of Ph. arundinacea from soil (Kn%), the composition PK treatment is best (12.36%) and K treatment is worse, while for N absorbing coefficient from fertilizer (Ky%), all the treatments are higher than control but the composition NPK treatment presented the highest (14.78%). For the absorbing coefficient of P from soil (Kn%), composition NK treatment is highest (19.30%), but K treatment was lower than control, while for that of P from fertilizer (Ky%), all the treatment were higher than control but the composition NP treatment showed the highest (19.52%). As to K absorbing coefficient from soil (Kn%), NP treatment is the best (19.2%) and single P treatment is worst, while for that (Ky%) of K from fertilizer the composition NPK treatment was best (28.44%). As concerns treatments for the outputs of fresh and dry crop, the composition NP treatment was best and all the treatment were higher than control. The composition NK treatment produced highest yield of seed and highest content of crude protein as compared to other treatments. For content of crude fat, the compositions NK and N treatments are best. The experiment indicates that application of fertilizer at proper proportions could increase the yield of Ph. Arundinacea and raise the utilizing efficiency of nourishment element from soil and fertilizer.
中国草芦(Phalaris arunainacea L.)是禾本科草芦属多年生根茎型优良禾草。对其进行N、P、K、NP、NK、PK、NPK、CK八个处理,在分蘖期采用M.K.Ka提出的公式测定中国草芦对土壤及肥料中N、P、K三元素的吸收和利用系数,并测定植物粗蛋白质和粗脂肪的含量,成熟期测定鲜草、干草产量和种子产量,结果表明:中国草芦对土壤中N的吸收系数(Kn%)以PK处理最高为12.36,K处理降低。对肥料中N的利用系数(Ky%)以NPK处理为最高(14.78),所有处理均高于对照。对土壤中P的吸收系数Kn%以NK处理最高为19.30,K处理的降低。对肥料中P的利用系数Ky%,以NP最高为19.52,所有处理均比CK高,对土壤中K的吸收系数Kn%以NP处理最高,为19.2,单一的P处理最低,对肥料中K的利用系数Ky%以NPK处理最高,为28.44。鲜草和干草产量以NP处理最高,且所有处理均高于对照。种子产量及粗蛋白质含量以NK处理最高,粗脂肪含量以NK、N处理最高,本实验说明中国草芦进行人工栽培后,施用一定比例的肥料,可以提高肥料的利用效率,提高产量的品质。
基金
This paper is supported by Educational Committee of Inner Mongolia autonomous Region (No. 950023)
