Maize Fertilizer Bijie Report of study _4902

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Maize Fertilizer Bijie Study Report

Such as large gray-yellow mud PzOs yield of corn per kg 5.25 ~ 6.02 kg, the small gray and yellow clay of 2.71 ~ 4.24 kg of yellow ashes 3.81 ~ 4.30 kg soil. While sallow average content of soil available Bo llppna, small gray-yellow mud 6ppm ~ 10ppm by the yellow soil is high, but are low range, so the effect of increasing yield and phosphorus content of available phosphorus level did not change significantly. ⑧ PzOe phosphate increased yield with the amount increasing. Such as large gray-yellow mud Mushi PO4 kg, each kg of P: O an average of 6.02 kg of corn increases, Shi PzOs to 8 kg, per kg PO; an average of only 5.25 kg of corn increases, increase yield and decrease fertilizer utilization rate fell to 4.72 from 5.42%. This trend in the small gray and yellow soil and yellow soil on the ashes also exist (see Table 4) * Table 4 Effect of P fertilizer on the yield of corn utilization startling comparison 3. Potassium Fertilizer on Maize Yield; from the test results show that, ① the yield as effective as nitrogen fertilizer, phosphate fertilizer, planted in the same soil, the average yield per kg of corn KO than nitrogen,[link widoczny dla zalogowanych], phosphorus less. ② genus in the same soil, soil available potassium content of high and low yield more effective (which was consistent yield and nitrogen). If the soil is too sallow average content of available K 92ppm, the average income per kg O} small gray and yellow corn 4.94 kg with an average soil K 121ppm, per kilogram of K: O} the average income ashes yellow corn 3.40 kg average soil containing potassium 125ppm, the average income per kg KtO 3.95 kg of corn. Obviously the big sallow with low potassium fertilizer increased yield good soil, fertilizer utilization, and high (see Table 5). Therefore, soil K content is low, the appropriate stimulation by potassium is able to play a role. Table 5 K on the yield of corn utilization of teaching comparative results startling KO (b) the amount of nitrogen and phosphorus fertilizer nitrogen from the above problems, effects of phosphorus fertilizers on the yield of corn is evident that the comparison with the increase of fertilizer, the yield effect of fertilizer significantly reduced. Ammonia in the three soil types, fertilizer partial regression line (Fig. 4), all were partial regression line into a parabola, before reaching the maximum amount of fertilizer, maize yields increased with the surface of fertilizer increased. But with the increase fertilizer, fertilizer negative effect of increasing yield lower than the maximum fertilization, not only reduce the yield or production. Therefore, the better fertilizer is not applied, Lai should be in accordance with the principle of increasing production and income, for the lowest fertilizer input, get the best harvest. Ten species of orchid by the regression equation of soil, the soil is gray and yellow are Bijie the maximum application amount of N 2O. 2 Guizhou Agriculture: Scientific per mu (kg kg / mu mu {kg) Figure 4 Friends of the yellow corn soil nitrogen (N) phosphorus (PtO.) Fertilizer partial regression pounds, acres, 23.5O kg / mu, acres of corn increases 97 ~ 141 kg, buckle yeast fertilizer costs,[link widoczny dla zalogowanych], net income can be 15.5s ~ 32. 17 元 N application rate for the 14 best hope. B3 ~ IB. 95 kg / mu, mu 92 ~ 134 kg of corn increases, less fertilizer into the visible, the net income of 20.41 ~ 35.24 yuan. It is not difficult to see the best although the quantity of applied N than the maximum amount of applied N is small, slow increase in the number of f-fat corn compared with the maximum or less fertilizer, and fertilizer utilization rate never increased to 16, 12.17 ~ 6.95 .28 ~ 21.14, so reducing fertilizer use, lower costs, increase revenues,[link widoczny dla zalogowanych], and thus the economic units than the maximum amount of fertilizer management. Similarly, in the application of phosphate fertilizer also exists on the optimal dosage of the problem. By calculating, P0s the maximum application rate is 6.71 ~ 21.26 kg / acre of corn may increase 23 to 53 kg / acre, net of fertilizer costs, make ends meet, but also reduce the 0.0b ~ l1.34 per acre per j and PO optimum amount of 2.2 to 9.17 kg / mu, can increase 12 ~ 3 kg of corn per acre net income i. 3: ~ 4.55 yuan, but also breaks the principle of Taiwan increase production. (C) on nitrogen and phosphorus fertilization on a single application of ammonia, phosphate and nitrogen and phosphorus fertilizer increased yield with Taiwan,[link widoczny dla zalogowanych], and the economic benefits of comparison, it is easy to see N and P compared with N fertilizer application units or single phosphate fertilizer is better. Single application such as large gray-yellow mud N1.63 kg / mu, 92 kg of corn increases, net income 20.4l per single application of PO. 9.17 kg / mu, 43 kg of corn increases, net income 4. Element; and two Fertilizers, can increase corn acres 14O kilograms,[link widoczny dla zalogowanych], net income of 26.97 yuan. The other two soil types is also clearly reflected this trend (Table 6). Ammonia, phosphate of different fertilization on the growth characteristics of corn is apparent, according to field