Effects of long-term (47 years) consistent fertilization and crop rotation on feed and diet productivity and quality
(0) Fertilization and crop rotation are major management practices being used world-wide for crop production. Although effects of these practices on feed and diet quality are highly important to animal and human nutrition, they are often temporally graduate, and can only be measurable as tong-term cumulative consequences. We conducted a study to determine the long-term effect (47 yrs) of consistent fertilization and crop rotation on diet and feed productivity and quality in a Brookston clay loam soil of eastern Canada. Treatments included factorial combinations of two cropping systems -continuous corn (CC) and a corn-oats-alfalfa-l-alfalfa-2 rotation and two fertilizer rates non-fertilized (NF) and continuously fertilized (CF). Each crop included in the rotation was grown in every year. Compared with the corresponding CC after 47 yrs crop rotation (CR) increased corn kernel yield (by 219％), crude protein (CP) (by 10％), and contents of P and K, but decreased corn kernel Mg, Fe, and Zn contents, with NF With CF, CR increased corn kernel yield (by 46％), CP (by 11％), and Mn content, but had no effect on P, K, Mg, Fe, and Zn contents. Alfalfa-1 forage yield with rotation was 59％ greater than that from alfalfa-2, but no cropping sequence effect was noticed on forage CP content, with NF. With CF, the opposite trend was discovered, i. e. no yield differences between alfalfa-1 and alfalfa-2; and CP from alfalfa-1 was 16％ higher than that from alfalfa-2. Continuous fertilization increased oats yield (by 343％) and contents of P, Mg and Mn, while it decreased Fe and Cu contents, compared with NF. Crude protein content of oats remained unchanged, regardless of fertilization. Nutritional quality of diet and feed may be agronomically manageable through rotation and fertilization to satisfy the needs of various groups of animals and human being.
Long term alfalfa fertilization rotation feed quality diet quality
T. Q. Zhang C. F. Drury C. S. Tan W. D. Reynolds
Greenhouse and Processing Crops Research Center, Agriculture and Agri-Food Canada, Harrow, ON, Canada, NOR 1G0
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
297-299
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）