摘要
借助于正交设设在三坪农场进行的田间试验表明土壤中有效氮比有效磷对春小麦产量的影响更大。由试验数据可以得到如下的回归方程:y:3271.53+2.605N+26.804 P+0.0586NP-0.00312N^2-0.3837P^2由此公式算出的维持施肥量大约为施氮量150kg/ha,施磷量45kg/ha。通径分析表明,氮的直接通径系数最大,而且对其他因子有非常间接的影响。
The field experiment carried out on Sanping Farm in the lignt of orthogonal regressive design indicates that available N in soil is more initiative factor affecting on wheat output than available P in soil. The data gained from the test obtains following regressive equation: y =3271.53+2.605N + 26.804P+ 0.0586NP-0.00312N^2-0.3837P^2 Dose of adequate fertilization calculated from the equation is about150kg N/ha and 45kg P_2C_5/ha. The path analysis shows that N-direct path coefficient is the biggest and has much indirect effect on others.
关键词
小麦
氮肥
磷肥
施肥
orthogonal regressive design
optimal dose of fertilizer
path analysis
direct path coefficient
