|
|
|
Interpretive Summaries:
2005 - Nutrient Management and Fertilizer Use Strategies for Sustainable Agriculture in Shanxi
2004 - Nutrient Management and Fertilizer Use Strategies for Sustainable Agriculture in Shanxi
2003 - Nutrient Management and Fertilizer Use Strategies for Sustainable Agriculture in Shanxi
2002 - Nutrient Management and Fertilizer Use Strategies for Sustainable Agriculture in Shanxi Province
2001 - Nutrient management and fertilizer use strategies for sustainable agriculture in Shanxi province
2000 - Nutrient management and fertilizer use strategies for sustainable agriculture in Shanxi province
Nutrient Management and Fertilizer Use Strategies for Sustainable Agriculture in Shanxi, 2005
Research activities continued with balanced fertilization studies on wheat and corn in Xinzhou and Linfen Cities. All field trials and demonstration activities produced significant effects on crop productivity.
At Xinzhou, the most optimal (OPT) combination of nitrogen (N), phosphorus (P), potassium (K), and zinc (Zn) was 225-150-200 kg N-P2O5-K2O/ha + 15 kg Zn/ha. This treatment produced the best corn yield of 8.42 t/ha. Omission of N, P, K, and Zn resulted in relative grain yields of 84%, 79%, 94%, and 93%, respectively. A separate study at Xinzhou found 210-90-(120 to 150) kg N-P2O5-K2O/ha increased corn grain yield (profit) by 569 to 1,367 kg/ha (US$9 to US$83/ha) over the - K treatment.
In Linfen, the highest yielding treatment for wheat was 180-150-150 kg/ha + 15 kg Zn/ha + 30 kg manganese (Mn)/ha. This treatment produced 7.72 t/ha and a US$1,152/ha profit while - N, -P, -K, -Zn, and -Mn treatments had respective relative yields (profits) of 83% (86%), 84% (88%), 94% (100%), 95% (94%), and 100% (100%). Thus, the benefit of added Mn fertilizer is rather small. The same complete treatment applied in corn produced a highest yield of 9.0 t/ha. Omission of N, P, K, Zn, and Mn produced realtive yields of 84%, 96%, 98%, 95%, and 95%, respectively. A long-term trial on wheat in Linfen has determined that annual application of 150 kg K2O/ha along with 200 kg N and 87 kg P2O5/ha could increase yield (profit) by 12% (5%) compared to the - K treatment, which produced 5.69 t/ha and US$873/ha. The treatment that also returned all straw residues produced the best yield (profit) of 6.6 t/ha (US$960/ha). A series of field demonstrations showed that balanced fertilizer increased: corn yield by 19% and net profit by US$81/ha; leek yield increased by 10% to 14% and profit by US$725 to US$827/ha; wheat yield increased by 13% to 17% and profit by US$45 to US$100/ha; and soybean yield increased by13% and profit by US$30/ha. Shanxi-NMS01
|
|
