A Study on the Mechanism of Farmland Mulching and Crop Yield Structure Ⅰ. Relationship between Shallow Application of Organic Fertilizer and High Yield of Cotton

The highest gluten content of wheat in the experiment reached up to 25.97%,the most suitable density was 1 500 thousand plants·hm-2,the best amounts of nitrogenous fertilizer was 75kg·hm-2,the best amounts of phosphate fertilizer was 56.25kg·hm-2,the best amounts of potassium fertilizer was 37.5kg·hm-2,and no zinc fertilizer was applied.

By using soil probes and enclosed chamber methods,N2O concentration in the soil profile,N2O fluxes on soil surface and influential factors of control treatment(no fertilizer added) and fertilized treatment(applied 180 kg/hm2 N) were studied during the corn growing season of loess soil.

A Study on the Mechanism of Farmland Mulching and Crop Yield Structure Ⅰ. Relationship between Shallow Application of Organic Fertilizer and High Yield of Cotton

As an application we produce complete hyperbolic 5-manifolds that are nontrivial plane bundles over closed hyperbolic 3-manifolds and conformally flat 4-manifolds that are nontrivial circle bundles over closed hyperbolic 3-manifolds.

As an application of the results we prove a generalization of Chevalley's restriction theorem for the classical Lie algebras.

The proof is an application of a recent result by W.

The application arises because of a very strong homological property enjoyed by certain cell filtrations forq-permutation modules.

We give as an application a family of singular Schubert varieties.

Using the properties ofn-Hopf algebras we show that certain spaces do not admit the structure of ann-valued group and that certain commutativen-valued groups do not arise by applying then-coset construction to any commutative group.

A basis is calledmonomial if each of its elements is the result of applying to a (fixed) highest weight vector a monomial in the Chevalley basis elementsYα, α a simple root, in the opposite Borel subalgebra.

Our lower bound comes from applying a decomposition theorem for "hyperbolic localization" [Br] to this torus action.

We then clarify the results by applying the theory of von Neumann algebras.

We present here a self-contained derivation, building the decomposition from basic principles such as the Euclidean algorithm, with a focus on applying it to wavelet filtering.

The theory is applied to the case of cubic hypersurfaces, which is the one most relevant to special geometry, obtaining the solution of the two classification problems and the description of the corresponding homogeneous special K?hler manifolds.

These results are applied to the theory ofcompactly causal symmetric spaces: we describe explicitly the complex domain Ξ associated to such a space.

This paper shows how the Kazhdan-Lusztig theory of cells can be directly applied to establish the quasi-heredity ofq-Schur algebras.

In [Ka1] its geometric counterpart was applied to construct contractible smooth affine varieties non-isomorphic to Euclidean spaces.

In the final section the theorem is applied to gradient actions on other homogeneous spaces and we show, that Hilgert's Convexity Theorem for moment maps can be derived from the results.

Effects of solid water and foliar fertilizer on survival and growth of seedlings in sand prevention and control

To promote afforestation in sandy lands and increase the effects of prevention and control of desertification, the application of a new drought-resistant product-solid water and foliar fertilizer "Shifengle"-was studied.

A comparison of three treatments (solid water, foliar fertilizer, and control) showed that both solid water and foliar fertilizer increased plant survival rate by 10% and 18.2%, respectively.

Ltd had a higher carbon conversion of 3%, a lower specific oxygen consumption of about 8%, and a lower specific carbon consumption of 2%-3% than that of Texaco CWS gasification at the Lunan Fertilizer Plant.

The results show that fertilizer and soil are important factors determining the aerosol particle over agricultural fields, and vegetable fields in suburban Beijing contribute significantly to the aerosol particle.

For the purpose of comparing the relative effect of various farm manures,field experimentswere carried out for four years at Nanking on a paddy soil;containing organic matter 1.5%,deri-ved from yellowish brown earth.The adsorption of nitrogen by one harvest of rice plant of the medium ripening variety was22—27% for rape-seed cake,17% for green manure,15% for water-logged compost,13% forstable manure,and 4.6—6% for pond mud.For rice of the early ripening variety,the percentageadsorption of nitrogen was 30%,20%,7.3%...

For the purpose of comparing the relative effect of various farm manures,field experimentswere carried out for four years at Nanking on a paddy soil;containing organic matter 1.5%,deri-ved from yellowish brown earth.The adsorption of nitrogen by one harvest of rice plant of the medium ripening variety was22—27% for rape-seed cake,17% for green manure,15% for water-logged compost,13% forstable manure,and 4.6—6% for pond mud.For rice of the early ripening variety,the percentageadsorption of nitrogen was 30%,20%,7.3% and 5.7% for the green manure,water-loggedcompost,mixed stable manure of cattle and swine,and grass compost respectively.On the basis of relative effect of various manures on the yield of rice,it was calculated that1 kg N of stable manure was equivalent to 0.45 kg N of rape-seed cake,0.55 kg N of greenmanure,0.7 kg N of water-logged compost,and 2.1—2.5 kg N of pond mud.For rice of theearly ripening variety,1 kg N of stable manure was equivalent to 0.38 kg N of gree manure,0.49 kg N of water-logged compost,and 1.19 kg N of grass compost.The liberation of nitrogen from manures proceeded most rapidly for the green manure,rape-seed cake entering the second and then water-logged compost.The liberation of nitrogen fromthe pond mud was so slow that it could hardly be distinguished from the controll treatment.Attention must pay to use nitrogen fertilizers as top-dressing when large amount of green manurehad be applied in order to prevent the lodging of rice plant,and on the contrary the applicationof top-dressing was essential when pond mud was used as the basic dressings.

Field practice has long proved that the application of straw ash on newly reclaimed paddy soils derived from the lacustrine deposit in the flooded areas of Li-Shia-Ho,Kiangsu, greatly increases the yields of wheat,barley and other upland crops.Field experimentes were conducted to compare the effect of superphosphate with straw ash as basic dressings at a same level of phosphate fertilizer.Results revealed that superphosphate has a similar effect as straw ash. Laboratory investigations gave evidences that fixation...

Field practice has long proved that the application of straw ash on newly reclaimed paddy soils derived from the lacustrine deposit in the flooded areas of Li-Shia-Ho,Kiangsu, greatly increases the yields of wheat,barley and other upland crops.Field experimentes were conducted to compare the effect of superphosphate with straw ash as basic dressings at a same level of phosphate fertilizer.Results revealed that superphosphate has a similar effect as straw ash. Laboratory investigations gave evidences that fixation of available soil phosphorus takes place as the flooded soil dried out through reclamation and drainage.

The results obtained from the experiments on the leaf-color shift in relation to the forma-tion of high yield of wheat in Nanking during 1961 and 1962 are summarized as follows:1.The leaf-color shift of wheat plant is an inherited biological character.The highyield is closely connected with these rhythmic shifts.The appearance of “green-yellow-green”at the early spring,shooting,and booting stages is determined by the fluctuation of thechlorophyll content and the level of nitrogen of the leaves.2.On account of...

The results obtained from the experiments on the leaf-color shift in relation to the forma-tion of high yield of wheat in Nanking during 1961 and 1962 are summarized as follows:1.The leaf-color shift of wheat plant is an inherited biological character.The highyield is closely connected with these rhythmic shifts.The appearance of “green-yellow-green”at the early spring,shooting,and booting stages is determined by the fluctuation of thechlorophyll content and the level of nitrogen of the leaves.2.On account of the 7-9th leaves of high-yielding plant having Comparatively large areaand high dry matter,the accumulation of dry matter in the internodes and leaf sheathes atthe basal part of the plant is promoted,whereby the formation of stiff culm is favored.Under the conditions of high-yielding cultural practices,a higher level of nitrogen of theplant body stimulates the differentiation of spikelets and florets.3.Under high-yielding cultural conditions,the normal shift to green color of the leaves atthe booting stage promotes the translocation of stored matter from vegetative organs to thekernels and favors the process of grain filling.The number of spikelets per head,the grainweight and the yield are consequently increased,while the number of sterile florets is loweredsignificantly.4.A proper lay-out of fertilizer practices is necessary for controlling leaf color shift andgetting a high yield.According to the results of our experiments,a moderate amount ofbasic fertilizers benefits the growing of Well-developed seedlings,while a heavy applicationof farmyard manure at the early winter increases the accumulation of the soil nutrients andtherefore favores the formation of strong tillers and large spikes.The shooting fertilizershould be applied when the green color fades away at shooting stage.The amount offertilizers applied depends upon the degree of leaf color.This application of fertilizers pro-motes the growth of the last three leaves,accelerates the translocation of nutrients to thespike and favors the formation of grain.Besides,the “heading rate”of tiller and the numberof spikelets are also increased.A further application of a proper amount of nitrogen beforethe emergence of the boot leaf enlarges the area of that leaf,significantly increases the rateof photosynthesis,the rate of grain formation and the grain weight,and finally raises theyield by 17.5 percent.